$NG
NOVAGOLD RESOURCES INC Stock $ng

$ng Overview Financials Valuation SEC Filings Company Website

2025 Q1 Form 10-K Financial Statement

#000117184325000387 Filed on January 23, 2025

Income Statement

Concept	2025 Q1	2024
Revenue		$0.00
YoY Change
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$22.00K
YoY Change		120.0%
% of Gross Profit
Operating Expenses		$37.86M
YoY Change		-6.09%
Operating Profit		-$37.86M
YoY Change		-6.09%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net		$2.695M
YoY Change		244.63%
Pretax Income		-$44.90M
YoY Change		-3.99%
Income Tax		$724.0K
% Of Pretax Income
Net Earnings		-$45.62M
YoY Change		-2.53%
Net Earnings / Revenue
Basic Earnings Per Share		-$0.14
Diluted Earnings Per Share
COMMON SHARES
Basic Shares Outstanding	334.6M	334.5K
Diluted Shares Outstanding

Balance Sheet

Concept	2025 Q1	2024 Q4	2024
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$42.22M
Short-Term Investments
Other Short-Term Assets		$1.530M
YoY Change		4.08%
Inventory
Prepaid Expenses		$1.207M
Receivables
Other Receivables
Total Short-Term Assets		$102.8M
YoY Change		-19.23%
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$4.402M
YoY Change		46.73%
Total Long-Term Assets		$6.999M
YoY Change		15.29%
TOTAL ASSETS
Total Short-Term Assets		$102.8M
Total Long-Term Assets		$6.999M
Total Assets		$109.8M
YoY Change		-17.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$4.486M
YoY Change		14.85%
LONG-TERM LIABILITIES
Long-Term Debt
YoY Change
Other Long-Term Liabilities		$1.161M
YoY Change		35.16%
Total Long-Term Liabilities		$1.161M
YoY Change		35.16%
TOTAL LIABILITIES
Total Short-Term Liabilities		$4.486M
Total Long-Term Liabilities		$1.161M
Total Liabilities		$157.2M
YoY Change		11.06%
SHAREHOLDERS EQUITY
Retained Earnings		-$2.105B
YoY Change		2.22%
Common Stock		$1.989B
YoY Change		0.12%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		-$47.42M
YoY Change
Total Liabilities & Shareholders Equity		$109.8M
YoY Change		-17.66%

Cashflow Statement

Concept	2025 Q1	2024 Q4	2024
OPERATING ACTIVITIES
Net Income			-$45.62M
YoY Change			-2.53%
Depreciation, Depletion And Amortization			$22.00K
YoY Change			120.0%
Cash From Operating Activities			-$12.64M
YoY Change			62.37%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities			-$59.00K
YoY Change			-144.7%
Cash From Investing Activities			$9.355M
YoY Change			-190.58%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities			-$174.0K
YoY Change
NET CHANGE
Cash From Operating Activities			-$12.64M
Cash From Investing Activities			$9.355M
Cash From Financing Activities			-$174.0K
Net Change In Cash			-$3.525M
YoY Change			-80.56%
FREE CASH FLOW
Cash From Operating Activities			-$12.64M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2024	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	A1
CY2024	dei	Entity Address Address Line1 EntityAddressAddressLine1	201 South Main Street, Suite 400
CY2024	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-635000	usd
CY2024	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-635000	usd
CY2024	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	339000	usd
CY2024	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	516000	usd
CY2024	ng	Notes Receivable Accretion NotesReceivableAccretion	-0	usd
CY2024	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	1436000	usd
CY2024	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	743000	usd
CY2022	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	132000000	usd
CY2024	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	usd
CY2023	ng	Proceeds From Sale Of Mineral Property ProceedsFromSaleOfMineralProperty	556000	usd
CY2022	ng	Proceeds From Sale Of Mineral Property ProceedsFromSaleOfMineralProperty	0	usd
CY2023	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	132000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-73000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-387000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-18133000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	63882000	usd
CY2024	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2024	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
CY2024	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--11-30
CY2024	dei	Amendment Flag AmendmentFlag	false
CY2024	dei	Entity Central Index Key EntityCentralIndexKey	0001173420
CY2024	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2024	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2024	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2024Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2024Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#Liabilities
CY2024Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2024Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P5Y
CY2024	us-gaap	Debt Instrument Variable Interest Rate Type Extensible Enumeration DebtInstrumentVariableInterestRateTypeExtensibleEnumeration	http://fasb.org/us-gaap/2024#PrimeRateMember
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#OtherAssetsNoncurrent
CY2024Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#OtherAssetsNoncurrent
CY2024Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1161000	usd
CY2024	us-gaap	Revenues Revenues	0	usd
CY2024	dei	Document Annual Report DocumentAnnualReport	true
CY2024	dei	Document Period End Date DocumentPeriodEndDate	2024-11-30
CY2024	dei	Document Transition Report DocumentTransitionReport	false
CY2024	dei	City Area Code CityAreaCode	801
CY2024	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2024	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2024	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2024	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2024	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2024	dei	Entity Small Business EntitySmallBusiness	false
CY2024	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2024	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2024	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2024	dei	Entity Shell Company EntityShellCompany	false
CY2024Q2	dei	Entity Public Float EntityPublicFloat	967700000	usd
CY2025Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	334646571
CY2024	dei	Auditor Name AuditorName	PricewaterhouseCoopers LLP
CY2024	dei	Auditor Location AuditorLocation	Vancouver, Canada
CY2024	dei	Auditor Firm AuditorFirmId	271
CY2024Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42224000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45749000	usd
CY2024Q4	us-gaap	Deposits Assets DepositsAssets	59000000	usd
CY2023Q4	us-gaap	Deposits Assets DepositsAssets	80000000	usd
CY2024Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1530000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1470000	usd
CY2024Q4	us-gaap	Assets Current AssetsCurrent	102754000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	127219000	usd
CY2024Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2597000	usd
CY2023Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	3071000	usd
CY2024Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4402000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3000000	usd
CY2024Q4	us-gaap	Assets Assets	109753000	usd
CY2023Q4	us-gaap	Assets Assets	133290000	usd
CY2024Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1371000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	703000	usd
CY2024Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	2482000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	2799000	usd
CY2024Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	220000	usd
CY2023Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	0	usd
CY2024Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	413000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	404000	usd
CY2024Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4486000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3906000	usd
CY2024Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	151522000	usd
CY2023Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	136748000	usd
CY2024Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1161000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	859000	usd
CY2024Q4	us-gaap	Liabilities Liabilities	157169000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	141513000	usd
CY2024Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2024Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2024Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2024Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2023Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2024Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	334600000
CY2024Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334600000
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	334200000
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334200000
CY2024Q4	us-gaap	Common Stock Value CommonStockValue	1989245000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	1986938000	usd
CY2024Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	93377000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	88621000	usd
CY2024Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2104932000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2059311000	usd
CY2024Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-25106000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-24471000	usd
CY2024Q4	us-gaap	Stockholders Equity StockholdersEquity	-47416000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	-8223000	usd
CY2024Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	109753000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	133290000	usd
CY2024	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	24936000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	21783000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20109000	usd
CY2024Q4	us-gaap	Liabilities Liabilities	157169000	usd
CY2024Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2024Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2024Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2024Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2023Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2024Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334600000
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	1986938000	usd
CY2024Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	93377000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	88621000	usd
CY2024Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2104932000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2059311000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-24471000	usd
CY2024Q4	us-gaap	Stockholders Equity StockholdersEquity	-47416000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	-8223000	usd
CY2024Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	109753000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	133290000	usd
CY2024	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	24936000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	21783000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20109000	usd
CY2024	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-12921000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-18529000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-28163000	usd
CY2024	us-gaap	Operating Expenses OperatingExpenses	37857000	usd
CY2024	us-gaap	Operating Income Loss OperatingIncomeLoss	-37857000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	-40312000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	-48272000	usd
CY2024	us-gaap	Interest Expense Debt InterestExpenseDebt	14774000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	13063000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	7962000	usd
CY2024	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	5378000	usd
CY2023	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	5791000	usd
CY2022	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	1591000	usd
CY2024	ng	Notes Receivable Accretion NotesReceivableAccretion	0	usd
CY2023	ng	Notes Receivable Accretion NotesReceivableAccretion	579000	usd
CY2022	ng	Notes Receivable Accretion NotesReceivableAccretion	849000	usd
CY2024	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	339000	usd
CY2023	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	541000	usd
CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	366000	usd
CY2024	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2695000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	782000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	784000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-44897000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46764000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-53376000	usd
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Net Income Loss NetIncomeLoss	-45621000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-53343000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-54000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-1128000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-54000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1128000	usd
CY2024	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-12921000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-18529000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-28163000	usd
CY2024	us-gaap	Operating Expenses OperatingExpenses	37857000	usd
CY2023	us-gaap	Operating Expenses OperatingExpenses	40312000	usd
CY2022	us-gaap	Operating Expenses OperatingExpenses	48272000	usd
CY2024	us-gaap	Operating Income Loss OperatingIncomeLoss	-37857000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	-40312000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	-48272000	usd
CY2024	us-gaap	Interest Expense Debt InterestExpenseDebt	14774000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	13063000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	7962000	usd
CY2024	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	5378000	usd
CY2023	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	5791000	usd
CY2022	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	1591000	usd
CY2024	ng	Notes Receivable Accretion NotesReceivableAccretion	0	usd
CY2024	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	339000	usd
CY2023	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	541000	usd
CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	366000	usd
CY2024	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2695000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	782000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	784000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46764000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-53376000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-46803000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-53343000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-54000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-1128000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-54000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1128000	usd
CY2024	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-46256000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-46857000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-54471000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-46857000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-54471000	usd
CY2024	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.14
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.16
CY2024	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	334458
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	334057
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	333236
CY2024	us-gaap	Net Income Loss NetIncomeLoss	-45621000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-46803000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-53343000	usd
CY2024	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-12921000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-18529000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-28163000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	13063000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	7962000	usd
CY2024	us-gaap	Share Based Compensation ShareBasedCompensation	7237000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	8731000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8214000	usd
CY2023	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	541000	usd
CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	366000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	595000	usd
CY2023	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	269000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	189000	usd
CY2023	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	556000	usd
CY2022	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	-0	usd
CY2024	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	35000	usd
CY2024	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-368000	usd
CY2023	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	535000	usd
CY2022	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	2056000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-7786000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.14
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.16
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	334057
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	333236
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-53343000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-18529000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-28163000	usd
CY2024	us-gaap	Interest Expense Debt InterestExpenseDebt	14774000	usd
CY2024	us-gaap	Share Based Compensation ShareBasedCompensation	7237000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	8731000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8214000	usd
CY2023	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	541000	usd
CY2022	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	366000	usd
CY2023	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	269000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	189000	usd
CY2023	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	556000	usd
CY2022	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	-0	usd
CY2023	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	49000	usd
CY2022	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-44000	usd
CY2022	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	2056000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-12371000	usd
CY2023	ng	Proceeds From Term Deposits ProceedsFromTermDeposits	148000000	usd
CY2022	ng	Proceeds From Term Deposits ProceedsFromTermDeposits	148000000	usd
CY2023	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	166000000	usd
CY2024	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-59000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-10328000	usd
CY2024	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-174000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	0	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2122000	usd
CY2024	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-64000	usd
CY2024	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3525000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-27242000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	45749000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	91124000	usd
CY2023	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	25000000	usd
CY2024	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-59000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12362000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	-0	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2122000	usd
CY2024	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-174000	usd
CY2024	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-64000	usd
CY2023	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-19000	usd
CY2024	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3525000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	45749000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	63882000	usd
CY2024Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	42224000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	78282000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8214000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2122000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-53343000	usd
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-46803000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-54000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	-8223000	usd
CY2024	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7237000	usd
CY2024	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2024	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	174000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	45749000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	78282000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8214000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2122000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1128000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	29903000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8731000	usd
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-46803000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-54000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	-8223000	usd
CY2024	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7237000	usd
CY2024	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2024	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	174000	usd
CY2024	us-gaap	Net Income Loss NetIncomeLoss	-45621000	usd
CY2024	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-635000	usd
CY2024Q4	us-gaap	Stockholders Equity StockholdersEquity	-47416000	usd
CY2024	us-gaap	Net Income Loss NetIncomeLoss	-45621000	usd
CY2024	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-635000	usd
CY2024Q4	us-gaap	Stockholders Equity StockholdersEquity	-47416000	usd
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	0	usd
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	24421000	usd
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	23572000	usd
CY2024	ng	Notes Receivable Accretion NotesReceivableAccretion	0	usd
CY2023	ng	Notes Receivable Accretion NotesReceivableAccretion	579000	usd
CY2022	ng	Notes Receivable Accretion NotesReceivableAccretion	849000	usd
CY2024	ng	Notes Receivable Payments NotesReceivablePayments	0	usd
CY2023	ng	Notes Receivable Payments NotesReceivablePayments	-25000000	usd
CY2022	ng	Notes Receivable Payments NotesReceivablePayments	0	usd
CY2024Q4	us-gaap	Notes Receivable Net NotesReceivableNet	0	usd
CY2023Q4	us-gaap	Notes Receivable Net NotesReceivableNet	0	usd
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	24421000	usd
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	0	usd
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	24421000	usd
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	23572000	usd
CY2024	ng	Notes Receivable Accretion NotesReceivableAccretion	0	usd
CY2023	ng	Notes Receivable Accretion NotesReceivableAccretion	579000	usd
CY2022	ng	Notes Receivable Accretion NotesReceivableAccretion	849000	usd
CY2024	ng	Notes Receivable Payments NotesReceivablePayments	0	usd
CY2023	ng	Notes Receivable Payments NotesReceivablePayments	-25000000	usd
CY2022	ng	Notes Receivable Payments NotesReceivablePayments	0	usd
CY2024Q4	us-gaap	Notes Receivable Net NotesReceivableNet	0	usd
CY2023Q4	us-gaap	Notes Receivable Net NotesReceivableNet	0	usd
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	24421000	usd
CY2024Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	89000	usd
CY2023Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	99000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1125000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1470000	usd
CY2024Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	896000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	757000	usd
CY2024Q4	ng	Office Equipment OfficeEquipment	119000	usd
CY2023Q4	ng	Office Equipment OfficeEquipment	141000	usd
CY2024Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4402000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3000000	usd
CY2023Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	99000	usd
CY2024Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1207000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1125000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1470000	usd
CY2024Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	896000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	757000	usd
CY2024Q4	ng	Office Equipment OfficeEquipment	119000	usd
CY2023Q4	ng	Office Equipment OfficeEquipment	141000	usd
CY2024Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4402000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3000000	usd
CY2023Q4	us-gaap	Notes Payable NotesPayable	136748000	usd
CY2022Q4	us-gaap	Notes Payable NotesPayable	123685000	usd
CY2021Q4	us-gaap	Notes Payable NotesPayable	115723000	usd
CY2024	us-gaap	Interest Expense Debt InterestExpenseDebt	14774000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	13063000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	7962000	usd
CY2024Q4	us-gaap	Notes Payable NotesPayable	151522000	usd
CY2023Q4	us-gaap	Notes Payable NotesPayable	136748000	usd
CY2022Q4	us-gaap	Notes Payable NotesPayable	123685000	usd
CY2023Q4	us-gaap	Notes Payable NotesPayable	136748000	usd
CY2022Q4	us-gaap	Notes Payable NotesPayable	123685000	usd
CY2021Q4	us-gaap	Notes Payable NotesPayable	115723000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	13063000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	7962000	usd
CY2024Q4	us-gaap	Notes Payable NotesPayable	151522000	usd
CY2023Q4	us-gaap	Notes Payable NotesPayable	136748000	usd
CY2022Q4	us-gaap	Notes Payable NotesPayable	123685000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	216000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	215000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	226000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	247000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	141000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	14000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1059000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	129000	usd
CY2024Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	930000	usd
CY2024	us-gaap	Operating Lease Payments OperatingLeasePayments	232000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	193000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	238000	usd
CY2024	us-gaap	Variable Lease Cost VariableLeaseCost	135000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	121000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	126000	usd
CY2024	us-gaap	Short Term Lease Cost ShortTermLeaseCost	6000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000	usd
CY2024	us-gaap	Lease Cost LeaseCost	373000	usd
CY2023	us-gaap	Lease Cost LeaseCost	319000	usd
CY2022	us-gaap	Lease Cost LeaseCost	369000	usd
CY2024	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	750000	usd
CY2024Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y7M6D
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y9M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y7M6D
CY2024Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.067	pure
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.059	pure
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	216000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	215000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	226000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	247000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	141000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	14000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1059000	usd
CY2024Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	129000	usd
CY2024Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	930000	usd
CY2024	us-gaap	Operating Lease Payments OperatingLeasePayments	232000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	193000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	238000	usd
CY2024	us-gaap	Variable Lease Cost VariableLeaseCost	135000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	121000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	126000	usd
CY2024	us-gaap	Short Term Lease Cost ShortTermLeaseCost	6000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000	usd
CY2024	us-gaap	Lease Cost LeaseCost	373000	usd
CY2023	us-gaap	Lease Cost LeaseCost	319000	usd
CY2022	us-gaap	Lease Cost LeaseCost	369000	usd
CY2024	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	750000	usd
CY2024Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y7M6D
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y9M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y7M6D
CY2024Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.067	pure
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.059	pure
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.058	pure
CY2024Q4	ng	Remediation Current Liabilities RemediationCurrentLiabilities	244000	usd
CY2023Q4	ng	Remediation Current Liabilities RemediationCurrentLiabilities	212000	usd
CY2024Q4	ng	Lease Obligations Noncurrent LeaseObligationsNoncurrent	761000	usd
CY2024Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1161000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.058	pure
CY2024Q4	ng	Lease Obligations Current LeaseObligationsCurrent	169000	usd
CY2023Q4	ng	Lease Obligations Current LeaseObligationsCurrent	192000	usd
CY2024Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	413000	usd
CY2024Q4	ng	Remediation Noncurrent Liabilities RemediationNoncurrentLiabilities	400000	usd
CY2024Q4	ng	Lease Obligations Noncurrent LeaseObligationsNoncurrent	761000	usd
CY2024Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1161000	usd
CY2024Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2024Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334567187
CY2024Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	334567187
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	334246859
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334246859
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2024Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2024Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2024Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2024Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334567187
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	334246859
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	334246859
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2024Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2024Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2024Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	3387000	usd
CY2024	us-gaap	Share Based Compensation ShareBasedCompensation	7237000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	8731000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8214000	usd
CY2024	us-gaap	Salaries And Wages SalariesAndWages	7958000	usd
CY2024	us-gaap	Other General Expense OtherGeneralExpense	3205000	usd
CY2024	us-gaap	Professional Fees ProfessionalFees	5279000	usd
CY2023	us-gaap	Professional Fees ProfessionalFees	1647000	usd
CY2022	us-gaap	Professional Fees ProfessionalFees	1177000	usd
CY2024	ng	Corporate Communications And Regulatory Expense CorporateCommunicationsAndRegulatoryExpense	1235000	usd
CY2023	ng	Corporate Communications And Regulatory Expense CorporateCommunicationsAndRegulatoryExpense	1084000	usd
CY2022	ng	Corporate Communications And Regulatory Expense CorporateCommunicationsAndRegulatoryExpense	1009000	usd
CY2024Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	3387000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2102000	usd
CY2024	us-gaap	Share Based Compensation ShareBasedCompensation	7237000	usd
CY2024	us-gaap	Salaries And Wages SalariesAndWages	7958000	usd
CY2024	us-gaap	Other General Expense OtherGeneralExpense	3205000	usd
CY2023	us-gaap	Other General Expense OtherGeneralExpense	3302000	usd
CY2022	us-gaap	Other General Expense OtherGeneralExpense	2992000	usd
CY2024	us-gaap	Professional Fees ProfessionalFees	5279000	usd
CY2024	ng	Corporate Communications And Regulatory Expense CorporateCommunicationsAndRegulatoryExpense	1235000	usd
CY2024	us-gaap	Depreciation Depreciation	22000	usd
CY2023	us-gaap	Depreciation Depreciation	10000	usd
CY2024	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	24936000	usd
CY2024	us-gaap	Depreciation Depreciation	22000	usd
CY2024	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	24936000	usd
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	29350311
CY2024	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7237000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8731000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8214000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7606200
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.59
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	3088900
CY2024	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	4.12
CY2024	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	890000
CY2024	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	3.67
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	765663
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	4.96
CY2024	ng	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Expired In Period SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod	-189902
CY2024	ng	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Expired In Period Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriodWeightedAverageGrantDateFairValue	7.16
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8849535
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.12
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y4M13D
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	138000	usd
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	4488049
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	7.39
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y3M
CY2024Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0	usd
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	29350311
CY2024	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7237000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8731000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8214000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7606200
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.59
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	3088900
CY2024	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	4.12
CY2024	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	890000
CY2024	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	3.67
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	765663
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	4.96
CY2024	ng	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Expired In Period SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod	-189902
CY2024	ng	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Expired In Period Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriodWeightedAverageGrantDateFairValue	7.16
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8849535
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.12
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y4M13D
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	138000	usd
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	4488049
CY2024Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	7.39
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y3M
CY2024Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0	usd
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.487	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.484	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.465	pure
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.487	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.484	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.465	pure
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0429	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0385	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0113	pure
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.76
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.4
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0429	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0385	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0113	pure
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.76
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.4
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.49
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	471000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2339000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5723000	usd
CY2024	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2023	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.49
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	471000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2339000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5723000	usd
CY2024	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2023	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2024Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	2348000	usd
CY2024	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	743000	usd
CY2023	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	556000	usd
CY2022	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	0	usd
CY2024	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	1436000	usd
CY2023	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	269000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	189000	usd
CY2024	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	516000	usd
CY2023	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-43000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	595000	usd
CY2024	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2695000	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	782000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2024Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	2348000	usd
CY2024	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	743000	usd
CY2023	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	556000	usd
CY2022	ng	Gain On Sale Of Mineral Property GainOnSaleOfMineralProperty	0	usd
CY2024	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	1436000	usd
CY2023	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	269000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	189000	usd
CY2024	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	516000	usd
CY2023	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-43000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	595000	usd
CY2024	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2695000	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	782000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	784000	usd
CY2024	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2024	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2024	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	724000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	784000	usd
CY2024	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2024	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2024	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2024	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	usd
CY2024	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2024	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	usd
CY2024	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	289000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-18213000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-17062000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-45186000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-28551000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-36314000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-44897000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46764000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-53376000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-44897000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46764000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-53376000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.15	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.15	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.15	pure
CY2024	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.12	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.12	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.12	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2023	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2022	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2024	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-12122000	usd
CY2023	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-12626000	usd
CY2022	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-14412000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.049	pure
CY2024	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2207000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.059	pure
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2767000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.045	pure
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2411000	usd
CY2024	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Percent EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomePercent	-0.038	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Amount EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomeAmount	1715000	usd
CY2023	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Percent EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomePercent	-0.036	pure
CY2023	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Amount EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomeAmount	1682000	usd
CY2022	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Percent EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomePercent	-0.012	pure
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	289000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-18213000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-17062000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-45186000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-36314000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-44897000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46764000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-53376000	usd
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-44897000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46764000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-53376000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.15	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.15	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.15	pure
CY2024	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.12	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.12	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.12	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2023	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2022	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2024	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-12122000	usd
CY2023	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-12626000	usd
CY2022	ng	Effective Income Tax Rate Reconciliation Combined Federal And Provincial Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationCombinedFederalAndProvincialStatutoryIncomeTaxRatePercent	0.27	pure
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-14412000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.049	pure
CY2024	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2207000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.059	pure
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2767000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	-0.045	pure
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2411000	usd
CY2024	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Percent EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomePercent	-0.038	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Amount EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomeAmount	1715000	usd
CY2023	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Percent EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomePercent	-0.036	pure
CY2023	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Amount EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomeAmount	1682000	usd
CY2022	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Percent EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomePercent	-0.012	pure
CY2022	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Amount EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomeAmount	666000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.008	pure
CY2024	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	359000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.009	pure
CY2023	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	407000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.01	pure
CY2022	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	518000	usd
CY2024	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Percent EffectiveIncomeTaxRateReconciliationWithholdingTaxesPercent	-0.002	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Amount EffectiveIncomeTaxRateReconciliationWithholdingTaxesAmount	99000	usd
CY2023	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Amount EffectiveIncomeTaxRateReconciliationWithholdingTaxesAmount	0	usd
CY2022	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Amount EffectiveIncomeTaxRateReconciliationWithholdingTaxesAmount	0	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.204	pure
CY2024	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	9144000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.185	pure
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	8623000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.223	pure
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	11852000	usd
CY2022	ng	Effective Income Tax Rate Reconciliation Foreign Accrual Property Income Amount EffectiveIncomeTaxRateReconciliationForeignAccrualPropertyIncomeAmount	666000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.008	pure
CY2024	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	359000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.009	pure
CY2023	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	407000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.01	pure
CY2022	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	518000	usd
CY2024	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Percent EffectiveIncomeTaxRateReconciliationWithholdingTaxesPercent	-0.002	pure
CY2024	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Amount EffectiveIncomeTaxRateReconciliationWithholdingTaxesAmount	99000	usd
CY2023	ng	Effective Income Tax Rate Reconciliation Withholding Taxes Amount EffectiveIncomeTaxRateReconciliationWithholdingTaxesAmount	0	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.204	pure
CY2024	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	9144000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.185	pure
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	8623000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.223	pure
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	11852000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.001	pure
CY2024	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	40000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0	pure
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	0	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.001	pure
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-32000	usd
CY2024	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.016	pure
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.001	pure
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.001	pure
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	200693000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	193508000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	46528000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	47995000	usd
CY2024Q4	ng	Deferred Tax Assets Mineral Properties DeferredTaxAssetsMineralProperties	605000	usd
CY2023Q4	ng	Deferred Tax Assets Mineral Properties DeferredTaxAssetsMineralProperties	624000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	448000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	462000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	183000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	184000	usd
CY2024Q4	ng	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	48486000	usd
CY2023Q4	ng	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	47522000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2105000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2105000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	56000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	196000	usd
CY2024Q4	ng	Deferred Tax Assets Retirement Obligation DeferredTaxAssetsRetirementObligation	183000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	970000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1129000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	300257000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	293856000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	299829000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	293536000	usd
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.001	pure
CY2024	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	40000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0	pure
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	0	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.001	pure
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-32000	usd
CY2024	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.016	pure
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	724000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.001	pure
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.001	pure
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	200693000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	193508000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	46528000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	47995000	usd
CY2024Q4	ng	Deferred Tax Assets Mineral Properties DeferredTaxAssetsMineralProperties	605000	usd
CY2023Q4	ng	Deferred Tax Assets Mineral Properties DeferredTaxAssetsMineralProperties	624000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	448000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	462000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	183000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	184000	usd
CY2024Q4	ng	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	48486000	usd
CY2023Q4	ng	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	47522000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2105000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2105000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	56000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	196000	usd
CY2024Q4	ng	Deferred Tax Assets Retirement Obligation DeferredTaxAssetsRetirementObligation	183000	usd
CY2023Q4	ng	Deferred Tax Assets Retirement Obligation DeferredTaxAssetsRetirementObligation	131000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	970000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1129000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	300257000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	293856000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	299829000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	293536000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	428000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	320000	usd
CY2024Q4	ng	Deferred Tax Liabilities Notes Receivable DeferredTaxLiabilitiesNotesReceivable	-0	usd
CY2023Q4	ng	Deferred Tax Liabilities Notes Receivable DeferredTaxLiabilitiesNotesReceivable	-0	usd
CY2024Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	428000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	320000	usd
CY2024Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	428000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	320000	usd
CY2024Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	428000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	320000	usd
CY2024Q4	ng	Deferred Tax Liabilities Notes Receivable DeferredTaxLiabilitiesNotesReceivable	-0	usd
CY2023Q4	ng	Deferred Tax Liabilities Notes Receivable DeferredTaxLiabilitiesNotesReceivable	-0	usd
CY2024Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	428000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	320000	usd
CY2024Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	428000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	320000	usd
CY2024Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-0	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-0	usd
CY2024Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	299829000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	293536000	usd
CY2024Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-0	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	-0	usd
CY2024Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	299829000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	293536000	usd
CY2024	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	100000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-694000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1962000	usd
CY2024	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	708000	usd
CY2024	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	100000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-694000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1962000	usd
CY2024	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	708000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-62000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	128000	usd
CY2024	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-309000	usd
CY2023	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	268000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-62000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	128000	usd
CY2024	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-309000	usd
CY2023	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	268000	usd
CY2022	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-92000	usd
CY2024	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	226000	usd
CY2023	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	0	usd
CY2022	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	0	usd
CY2024	ng	Increase Decrease In Remediation Liability IncreaseDecreaseInRemediationLiability	-157000	usd
CY2023	ng	Increase Decrease In Remediation Liability IncreaseDecreaseInRemediationLiability	-1435000	usd
CY2022	ng	Increase Decrease In Remediation Liability IncreaseDecreaseInRemediationLiability	-130000	usd
CY2024	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-368000	usd
CY2023	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	535000	usd
CY2022	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	2056000	usd
CY2024	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	5539000	usd
CY2023	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	5754000	usd
CY2022	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	1684000	usd
CY2024	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	usd
CY2023	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	325000	usd
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	17000	usd
CY2024	us-gaap	Income Taxes Paid IncomeTaxesPaid	645000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	75000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	usd
CY2022	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-92000	usd
CY2024	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	226000	usd
CY2023	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	0	usd
CY2022	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	0	usd
CY2024	ng	Increase Decrease In Remediation Liability IncreaseDecreaseInRemediationLiability	-157000	usd
CY2023	ng	Increase Decrease In Remediation Liability IncreaseDecreaseInRemediationLiability	-1435000	usd
CY2022	ng	Increase Decrease In Remediation Liability IncreaseDecreaseInRemediationLiability	-130000	usd
CY2024	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-368000	usd
CY2023	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	535000	usd
CY2022	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	2056000	usd
CY2024	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	5539000	usd
CY2023	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	5754000	usd
CY2022	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	1684000	usd
CY2024	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	usd
CY2023	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	325000	usd
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	17000	usd
CY2024	us-gaap	Income Taxes Paid IncomeTaxesPaid	645000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	75000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	usd
CY2024	dei	Document Type DocumentType	10-K
CY2024	dei	Entity Registrant Name EntityRegistrantName	NOVAGOLD RESOURCES INC.
CY2024	dei	Trading Symbol TradingSymbol	NG
CY2024	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2024	dei	Entity File Number EntityFileNumber	001-31913
CY2024	dei	Entity Address City Or Town EntityAddressCityOrTown	Salt Lake City
CY2024	dei	Entity Address State Or Province EntityAddressStateOrProvince	UT
CY2024	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	84111
CY2024	ng	Proceeds From Term Deposits ProceedsFromTermDeposits	140000000	usd
CY2024	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	119000000	usd
CY2024	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	12447000	usd
CY2023	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	17752000	usd
CY2022	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	28435000	usd
CY2024	ng	Proceeds From Sale Of Mineral Property ProceedsFromSaleOfMineralProperty	743000	usd
CY2024	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	9355000	usd
CY2024	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	174000	usd
CY2024	dei	Security12b Title Security12bTitle	Common Shares
CY2024Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1530000	usd
CY2024Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	3387000	usd
CY2023Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	2102000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	404000	usd
CY2023Q4	ng	Remediation Noncurrent Liabilities RemediationNoncurrentLiabilities	250000	usd
CY2023Q4	ng	Lease Obligations Noncurrent LeaseObligationsNoncurrent	609000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	859000	usd
CY2023	us-gaap	Salaries And Wages SalariesAndWages	7009000	usd
CY2022	us-gaap	Salaries And Wages SalariesAndWages	6710000	usd
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022	us-gaap	Depreciation Depreciation	7000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	21783000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20109000	usd
CY2024	dei	Local Phone Number LocalPhoneNumber	639-0511
CY2023	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-43000	usd
CY2023	ng	Notes Receivable Accretion NotesReceivableAccretion	579000	usd
CY2022	ng	Notes Receivable Accretion NotesReceivableAccretion	849000	usd
CY2024	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-12642000	usd
CY2022	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	usd

Files In Submission

Name	View Source	Status
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0001171843-25-000387-index.html	Edgar Link	pending
0001171843-25-000387.txt	Edgar Link	pending
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chart.jpg	Edgar Link	pending
donlingold.jpg	Edgar Link	pending
ex_766466.htm	Edgar Link	pending
ex_766467.htm	Edgar Link	pending
ex_766468.htm	Edgar Link	pending
ex_766469.htm	Edgar Link	pending
ex_766470.htm	Edgar Link	pending
ex_766471.htm	Edgar Link	pending
ex_766472.htm	Edgar Link	pending
ex_766473.htm	Edgar Link	pending
ex_767339.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
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ng-20241130_cal.xml	Edgar Link	unprocessable
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ng20241130_10k_htm.xml	Edgar Link	completed

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$NG
NOVAGOLD RESOURCES INC Stock $ng

2025 Q1 Form 10-K Financial Statement

#000117184325000387 Filed on January 23, 2025

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NG NOVAGOLD RESOURCES INC Stock $ng

2025 Q1 Form 10-K Financial Statement

#000117184325000387 Filed on January 23, 2025

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NG
NOVAGOLD RESOURCES INC Stock $ng