$MP
MP Materials Corp. / DE Stock $mp

$mp Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000180136824000014 Filed on February 28, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$48.68M	$41.21M	$253.4M
YoY Change	-49.13%	-55.81%	-51.95%
Cost Of Revenue	$35.59M	$23.58M	$92.71M
YoY Change	46.99%	-3.91%	2.69%
Gross Profit	$13.09M	$17.63M	$160.7M
YoY Change	-81.69%	-74.34%	-63.24%
Gross Profit Margin	26.89%	42.78%	63.42%
Selling, General & Admin	$21.27M	$21.42M	$79.25M
YoY Change	9.61%	10.87%	4.49%
% of Gross Profit	162.47%	121.49%	49.3%
Research & Development	$4.206M		$3.497M
YoY Change
% of Gross Profit	32.13%		2.18%
Depreciation & Amortization	$18.39M	$18.61M	$55.71M
YoY Change	126.36%	232.72%	203.49%
% of Gross Profit	140.45%	105.57%	34.66%
Operating Expenses	$21.27M	$41.31M	$79.25M
YoY Change	9.61%	34.48%	4.49%
Operating Profit	-$32.43M	-$23.68M	-$17.72M
YoY Change	-198.39%	-162.34%	-105.41%
Interest Expense	-$2.857M	-$1.107M	$5.254M
YoY Change	110.23%	-16.83%	-9.19%
% of Operating Profit
Other Income/Expense, Net	$12.66M	$14.08M	$56.05M
YoY Change	-7.57%	28.53%	187.03%
Pretax Income	$23.63M	-$20.66M	$33.08M
YoY Change	-47.83%	-143.87%	-90.3%
Income Tax	$7.144M	-$4.398M	$8.768M
% Of Pretax Income	30.23%		26.51%
Net Earnings	$16.49M	-$16.26M	$24.31M
YoY Change	-55.97%	-124.26%	-91.59%
Net Earnings / Revenue	33.87%	-39.46%	9.59%
Basic Earnings Per Share	$0.09		$0.14
Diluted Earnings Per Share	-$0.08	-$0.09	$0.14
COMMON SHARES
Basic Shares Outstanding	178.1M shares	177.8M shares	177.2M shares
Diluted Shares Outstanding	186.8M shares		178.2M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$946.8M	$997.8M	$997.8M
YoY Change	-19.01%	-15.6%	-15.6%
Cash & Equivalents	$296.5M	$263.4M	$263.4M
Short-Term Investments	$650.3M	$734.5M	$734.5M
Other Short-Term Assets	$10.02M	$8.820M	$8.820M
YoY Change	-26.13%	-53.26%	-53.26%
Inventory	$108.5M	$95.18M	$95.18M
Prepaid Expenses
Receivables	$21.60M	$10.03M	$10.03M
Other Receivables	$19.30M	$19.30M	$19.30M
Total Short-Term Assets	$1.106B	$1.131B	$1.131B
YoY Change	-12.72%	-12.57%	-12.57%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.196B	$1.158B	$1.168B
YoY Change	19.38%	23.76%	24.83%
Goodwill
YoY Change
Intangibles	$8.582M	$8.881M
YoY Change		9878.65%
Long-Term Investments	$9.600M	$9.700M	$9.673M
YoY Change
Other Assets	$8.889M	$5.252M	$18.60M
YoY Change	91.99%	112.46%	126.41%
Total Long-Term Assets	$1.248B	$1.205B	$1.205B
YoY Change	23.1%	27.68%	27.68%
TOTAL ASSETS
Total Short-Term Assets	$1.106B	$1.131B	$1.131B
Total Long-Term Assets	$1.248B	$1.205B	$1.205B
Total Assets	$2.354B	$2.336B	$2.336B
YoY Change	3.2%	4.41%	4.41%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.14M	$28.00M	$28.00M
YoY Change	-61.88%	-61.26%	-61.26%
Accrued Expenses	$73.99M	$73.94M	$73.94M
YoY Change		29.86%
Deferred Revenue		$0.00
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.061M	$2.301M	$2.301M
YoY Change	-11.43%
Total Short-Term Liabilities	$107.5M	$108.6M	$108.6M
YoY Change	14.56%	11.36%	11.36%
LONG-TERM LIABILITIES
Long-Term Debt	$935.6M	$682.0M	$682.0M
YoY Change	37.72%	0.52%	0.52%
Other Long-Term Liabilities	$4.247M	$3.025M	$49.35M
YoY Change	-4.86%	-39.5%	83.63%
Total Long-Term Liabilities	$1.109B	$862.1M	$731.3M
YoY Change	32.72%	4.16%	3.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$107.5M	$108.6M	$108.6M
Total Long-Term Liabilities	$1.109B	$862.1M	$731.3M
Total Liabilities	$1.216B	$970.7M	$970.7M
YoY Change	30.88%	4.92%	4.92%
SHAREHOLDERS EQUITY
Retained Earnings	$402.2M	$385.7M
YoY Change	0.84%	6.73%
Common Stock	$18.00K	$17.00K
YoY Change	5.88%	-5.56%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$202.6M	$0.00
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.138B	$1.366B	$1.366B
YoY Change
Total Liabilities & Shareholders Equity	$2.354B	$2.336B	$2.336B
YoY Change	3.2%	4.41%	4.41%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$16.49M	-$16.26M	$24.31M
YoY Change	-55.97%	-124.26%	-91.59%
Depreciation, Depletion And Amortization	$18.39M	$18.61M	$55.71M
YoY Change	126.36%	232.72%	203.49%
Cash From Operating Activities	-$41.13M	-$13.80M	$62.70M
YoY Change	-174.11%	-147.43%	-81.75%
INVESTING ACTIVITIES
Capital Expenditures	$51.84M	$73.00M	$261.9M
YoY Change	-30.38%	-34.98%	-19.81%
Acquisitions
YoY Change
Other Investing Activities	$92.55M	-$196.2M	$330.6M
YoY Change	-82.75%	-3.34%	-132.08%
Cash From Investing Activities	$40.71M	-$269.1M	$68.70M
YoY Change	-91.19%	-14.64%	-105.06%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$32.92M	-1.317M	-$9.917M
YoY Change	-582.56%	-72.31%	-59.01%
NET CHANGE
Cash From Operating Activities	-$41.13M	-13.80M	$62.70M
Cash From Investing Activities	$40.71M	-269.1M	$68.70M
Cash From Financing Activities	$32.92M	-1.317M	-$9.917M
Net Change In Cash	$32.51M	-284.2M	$121.5M
YoY Change	-93.64%	-2.3%	-111.71%
FREE CASH FLOW
Cash From Operating Activities	-$41.13M	-$13.80M	$62.70M
Capital Expenditures	$51.84M	$73.00M	$261.9M
Free Cash Flow	-$92.96M	-$86.80M	-$199.2M
YoY Change	390.03%	4.36%	-1277.36%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8768000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	24307000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	289004000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1181157000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	135037000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3330000	usd
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001801368
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Registrant Name EntityRegistrantName	MP Materials Corp. / DE
CY2023Q4	us-gaap	Environmental Loss Contingency Current Statement Of Financial Position Extensible Enumeration EnvironmentalLossContingencyCurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilitiesCurrent
CY2023Q4	us-gaap	Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#AccruedEnvironmentalLossContingenciesNoncurrent
CY2023Q2	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2022Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesCurrent
CY2023Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesCurrent
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
CY2023Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesCurrent
CY2022Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesCurrent
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-39277
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	84-4465489
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	1700 S. Pavilion Center Drive, Suite 800
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Las Vegas
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	NV
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	89135
CY2023	dei	City Area Code CityAreaCode	702
CY2023	dei	Local Phone Number LocalPhoneNumber	844-6111
CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value of $0.0001 per share
CY2023	dei	Trading Symbol TradingSymbol	MP
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	3600000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	178077678	shares
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	263351000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	136627000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	734493000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1045718000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	997844000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	1182345000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	0	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	0	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	10029000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	32856000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	95182000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	57554000	usd
CY2023Q4	us-gaap	Grants Receivable Current GrantsReceivableCurrent	19302000	usd
CY2022Q4	us-gaap	Grants Receivable Current GrantsReceivableCurrent	0	usd
CY2023Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8820000	usd
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	21073000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	1131177000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	1293828000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1158054000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	935743000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10065000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	99000	usd
CY2023Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	13350000	usd
CY2022Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	5744000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	9673000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	8881000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	89000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5252000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2284000	usd
CY2023Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	1205275000	usd
CY2022Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	943959000	usd
CY2023Q4	us-gaap	Assets Assets	2336452000	usd
CY2022Q4	us-gaap	Assets Assets	2237787000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	27995000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	15326000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	73939000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	56939000	usd
CY2023Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	0	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	21163000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	6616000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4053000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	108550000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	97481000	usd
CY2023Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	5518000	usd
CY2022Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	5295000	usd
CY2023Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	16545000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	16580000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	681980000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	678444000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	6829000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	15000	usd
CY2023Q4	us-gaap	Deferred Income Noncurrent DeferredIncomeNoncurrent	17433000	usd
CY2022Q4	us-gaap	Deferred Income Noncurrent DeferredIncomeNoncurrent	0	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	130793000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	122353000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	3025000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4985000	usd
CY2023Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	862123000	usd
CY2022Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	827672000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	970673000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	925153000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	450000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	450000000	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	178082383	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	178082383	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	177706608	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	177706608	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	17000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	18000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	979891000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	951008000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	385726000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	361419000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	145000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	189000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1365779000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1312634000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2336452000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2237787000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	253445000	usd
CY2023	mp	Cost Of Revenue Excluding Depreciation Depletion And Amortization CostOfRevenueExcludingDepreciationDepletionAndAmortization	92714000	usd
CY2022	mp	Cost Of Revenue Excluding Depreciation Depletion And Amortization CostOfRevenueExcludingDepreciationDepletionAndAmortization	92218000	usd
CY2023	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	79245000	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	75857000	usd
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	56646000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	55709000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18356000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	24382000	usd
CY2023	mp	Start Up Costs StartUpCosts	21330000	usd
CY2022	mp	Start Up Costs StartUpCosts	7551000	usd
CY2021	mp	Start Up Costs StartUpCosts	378000	usd
CY2023	mp	Advanced Projects And Development Costs AdvancedProjectsAndDevelopmentCosts	14932000	usd
CY2022	mp	Advanced Projects And Development Costs AdvancedProjectsAndDevelopmentCosts	4249000	usd
CY2021	mp	Advanced Projects And Development Costs AdvancedProjectsAndDevelopmentCosts	4195000	usd
CY2023	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	7234000	usd
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1868000	usd
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	4753000	usd
CY2023	us-gaap	Costs And Expenses CostsAndExpenses	271164000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	200099000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	166607000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	-17719000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	327411000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	165345000	usd
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-5254000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-5786000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-8904000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	56048000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	19527000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3754000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33075000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	341152000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	160195000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52148000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25158000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	177181661	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	176519203	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173469546	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	178152212	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	193453087	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	189844028	shares
CY2023	us-gaap	Net Income Loss NetIncomeLoss	24307000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	289004000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	135037000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-44000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	189000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	24263000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	289193000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	135037000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	853877000	usd
CY2021	mp	Stock Issued During Period Value Warrants Redeemed StockIssuedDuringPeriodValueWarrantsRedeemed	-1000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	22931000	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3330000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	135037000	usd
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	-218000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1008732000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	33066000	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	18357000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	289004000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	189000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1312634000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	27104000	usd
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	7185000	usd
CY2023	us-gaap	Stock Issued During Period Value Purchase Of Assets StockIssuedDuringPeriodValuePurchaseOfAssets	8963000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	24307000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-44000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1365779000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	24307000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	289004000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	55709000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18356000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	24382000	usd
CY2023	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	908000	usd
CY2022	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	1477000	usd
CY2021	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	2375000	usd
CY2023	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	26316000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	9958000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	0	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	3401000	usd
CY2023	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-808000	usd
CY2022	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-391000	usd
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-569000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	25236000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	31780000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	22931000	usd
CY2023	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	3536000	usd
CY2022	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	4034000	usd
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	7384000	usd
CY2023	us-gaap	Inventory Write Down InventoryWriteDown	2285000	usd
CY2022	us-gaap	Inventory Write Down InventoryWriteDown	0	usd
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	1809000	usd
CY2023	mp	Contract With Customer Liability Related Parties Revenue Recognized For Debt Principal Reduction ContractWithCustomerLiabilityRelatedPartiesRevenueRecognizedForDebtPrincipalReduction	0	usd
CY2022	mp	Contract With Customer Liability Related Parties Revenue Recognized For Debt Principal Reduction ContractWithCustomerLiabilityRelatedPartiesRevenueRecognizedForDebtPrincipalReduction	13566000	usd
CY2021	mp	Contract With Customer Liability Related Parties Revenue Recognized For Debt Principal Reduction ContractWithCustomerLiabilityRelatedPartiesRevenueRecognizedForDebtPrincipalReduction	54828000	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-8455000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-17789000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-17425000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-22827000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-18153000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	47420000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	47099000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	24314000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	8229000	usd
CY2023	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	19302000	usd
CY2022	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	0	usd
CY2021	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	0	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-2377000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	8223000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	4154000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	11305000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	1962000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	5530000	usd
CY2023	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-21163000	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	17700000	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	3463000	usd
CY2023	mp	Increase Decrease In Deferred Government Grant IncreaseDecreaseInDeferredGovernmentGrant	19120000	usd
CY2022	mp	Increase Decrease In Deferred Government Grant IncreaseDecreaseInDeferredGovernmentGrant	0	usd
CY2021	mp	Increase Decrease In Deferred Government Grant IncreaseDecreaseInDeferredGovernmentGrant	0	usd
CY2023	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-294000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1071000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-902000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	62699000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	343514000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	101971000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	261897000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	326595000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	123870000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1185477000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2779666000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	507736000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1463160000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1015190000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	281000000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	usd
CY2023	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	9673000	usd
CY2022	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	usd
CY2021	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	usd
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	18000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	125000	usd
CY2023	mp	Proceeds From Government Reimbursements For Property Plant And Equipment ProceedsFromGovernmentReimbursementsForPropertyPlantAndEquipment	2800000	usd
CY2022	mp	Proceeds From Government Reimbursements For Property Plant And Equipment ProceedsFromGovernmentReimbursementsForPropertyPlantAndEquipment	5130000	usd
CY2021	mp	Proceeds From Government Reimbursements For Property Plant And Equipment ProceedsFromGovernmentReimbursementsForPropertyPlantAndEquipment	4382000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	68697000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1356971000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-119363000	usd
CY2023	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	690000000	usd
CY2023	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	2732000	usd
CY2022	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	5834000	usd
CY2021	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	2435000	usd
CY2023	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	17749000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	7185000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	18357000	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-377000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-9917000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-24191000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	666109000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	121479000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1037648000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	648717000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	143509000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	532440000	usd
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	28590000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	264988000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	143509000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1181157000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	263351000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	136627000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1179297000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1290000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	6287000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1344000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	347000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	595000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	516000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	264988000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	143509000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1181157000	usd
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Financial instruments that potentially subject the Company to credit risk consist principally of cash, cash equivalents and short-term investments, and receivables from customers. The Company believes that its credit risk is limited because the Company’s current contracts are with companies that have a reliable payment history. The Company does not believe that it is exposed to any significant risks related to its cash accounts, money market funds, or short-term investments.<div style="margin-bottom:10pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of December 31, 2023, Shenghe was the Company’s principal customer and accounted for more than 90% of revenue. Rare earth concentrate is not quoted on any major commodities market or exchange and demand for rare earth concentrate is currently constrained to a relatively limited number of refiners, a significant majority of which are based in China. Uncertainty exists as to the market price of rare earth oxide (“REO”), as evidenced by the volatility experienced in 2022 and 2023 primarily due to concerns over the global economic conditions and actual or perceived concerns over increases in the supply of or slower growth in the demand for rare earth products. Furthermore, while revenue is generated in the U.S., Shenghe conducts its primary operations in China and may transport and sell products in the Chinese market. Therefore, the Company’s revenue is affected by Shenghe’s ultimate realized prices in China, including the impact of changes in the exchange rate between the Chinese Yuan and the U.S. dollar. In addition, the ongoing economic conflict between China and the U.S., which has previously resulted in tariffs and trade barriers, may negatively affect the Company’s business and results of operations. See </span><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#id60391492cf54e72a8c63cc5405338ef_205" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Note </a></span><span style="color:#0000ee;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">20</span><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#id60391492cf54e72a8c63cc5405338ef_205" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">, “Related-Party Transactions,”</a></span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> for additional information.</span></div>
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect (i) the reported amounts of assets and liabilities, (ii) the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements, and (iii) the reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to the useful lives and recoverability of long-lived assets (such as the effects of mineral reserves and cash flows from operating the mine in determining the life of the mine); the valuation allowance of deferred tax assets; asset retirement and environmental obligations; and determining the net realizable value of inventories. Management bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may differ from those estimates.</span>
CY2023Q4	mp	Inventory Mined Ore Stockpiles Net Of Reserves Current InventoryMinedOreStockpilesNetOfReservesCurrent	28507000	usd
CY2023Q4	us-gaap	Interest Receivable InterestReceivable	900000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	2500000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	0	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	0	usd
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain amounts in prior periods have been reclassified to conform to the current year presentation.</span>
CY2023Q4	mp	Cash And Cash Equivalents Amortized Cost CashAndCashEquivalentsAmortizedCost	263320000	usd
CY2023Q4	mp	Cash Equivalents Accumulated Gross Unrealized Gains Before Tax CashEquivalentsAccumulatedGrossUnrealizedGainsBeforeTax	31000	usd
CY2023Q4	mp	Cash Equivalents Accumulated Gross Unrealized Loss Before Tax CashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax	0	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	263351000	usd
CY2022Q4	mp	Cash And Cash Equivalents Amortized Cost CashAndCashEquivalentsAmortizedCost	136628000	usd
CY2022Q4	mp	Cash Equivalents Accumulated Gross Unrealized Gains Before Tax CashEquivalentsAccumulatedGrossUnrealizedGainsBeforeTax	1000	usd
CY2022Q4	mp	Cash Equivalents Accumulated Gross Unrealized Loss Before Tax CashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax	2000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	136627000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	734332000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	249000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	88000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	734493000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1045464000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	362000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	108000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1045718000	usd
CY2023Q4	mp	Cash Cash Equivalents And Available For Sale Debt Securities Amortized Cost CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost	997652000	usd
CY2023Q4	mp	Cash Equivalents And Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax CashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	280000	usd
CY2023Q4	mp	Cash Equivalents And Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax CashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	88000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	997844000	usd
CY2022Q4	mp	Cash Cash Equivalents And Available For Sale Debt Securities Amortized Cost CashCashEquivalentsAndAvailableForSaleDebtSecuritiesAmortizedCost	1182092000	usd
CY2022Q4	mp	Cash Equivalents And Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax CashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	363000	usd
CY2022Q4	mp	Cash Equivalents And Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax CashEquivalentsAndAvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	110000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	1182345000	usd
CY2022Q4	mp	Inventory Mined Ore Stockpiles Net Of Reserves Current InventoryMinedOreStockpilesNetOfReservesCurrent	25502000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	575000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	258000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	203000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	573000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
CY2023	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	55637000	usd
CY2022	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	19774000	usd
CY2021	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	0	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	911096000	usd
CY2023Q4	mp	Debt Securities Available For Sale Fair Value Maturity Allocated And Single Maturity Date After Year One Through Two Years DebtSecuritiesAvailableForSaleFairValueMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughTwoYears	22787000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	933883000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	42371000	usd
CY2023Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	15019000	usd
CY2022Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	1710000	usd
CY2023Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	9285000	usd
CY2022Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	1752000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	95182000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	57554000	usd
CY2023Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	13350000	usd
CY2022Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	5744000	usd
CY2023Q4	mp	Total Current And Non Current Inventories TotalCurrentAndNonCurrentInventories	108532000	usd
CY2022Q4	mp	Total Current And Non Current Inventories TotalCurrentAndNonCurrentInventories	63298000	usd
CY2023Q4	mp	Inventory Mined Ore Stockpiles Net Of Reserves Non Current InventoryMinedOreStockpilesNetOfReservesNonCurrent	9100000	usd
CY2022Q4	mp	Inventory Mined Ore Stockpiles Net Of Reserves Non Current InventoryMinedOreStockpilesNetOfReservesNonCurrent	5700000	usd
CY2023Q4	us-gaap	Inventory Write Down InventoryWriteDown	2300000	usd
CY2022	us-gaap	Inventory Write Down InventoryWriteDown	0	usd
CY2021Q2	us-gaap	Inventory Write Down InventoryWriteDown	1800000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1272682000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	994478000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	114628000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	58735000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1158054000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	935743000	usd
CY2023	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	280000000	usd
CY2022	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	361200000	usd
CY2021	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	138000000	usd
CY2022	us-gaap	Property Plant And Equipment Gross Period Increase Decrease PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease	-10400000	usd
CY2021	us-gaap	Property Plant And Equipment Gross Period Increase Decrease PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease	-8700000	usd
CY2022	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Period Increase Decrease AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentPeriodIncreaseDecrease	-2700000	usd
CY2021	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Period Increase Decrease AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentPeriodIncreaseDecrease	-1100000	usd
CY2023	us-gaap	Depreciation Depreciation	43998000	usd
CY2023	us-gaap	Depletion Depletion	11067000	usd
CY2022	us-gaap	Depletion Depletion	12209000	usd
CY2023	mp	Demolition Costs DemolitionCosts	5500000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	usd
CY2023Q3	mp	Consulting Agreement Expected Service Fee ConsultingAgreementExpectedServiceFee	15000000	usd
CY2023Q3	mp	Consulting Agreement Expected Service Fee Payment Period ConsultingAgreementExpectedServiceFeePaymentPeriod	P4Y
CY2023Q3	mp	Consulting Agreement Expected Service Fee Payment Period ConsultingAgreementExpectedServiceFeePaymentPeriod	P4Y
CY2023Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	316000	usd
CY2022Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	89000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	8963000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	0	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	398000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	0	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8565000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	0	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	8881000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	89000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	400000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	usd
CY2023	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2021	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1195000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1195000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1195000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1195000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1195000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2590000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8565000	usd
CY2022	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-13100000	usd
CY2022	us-gaap	Property Plant And Equipment Gross Period Increase Decrease PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease	-10400000	usd
CY2022	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Period Increase Decrease AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentPeriodIncreaseDecrease	-2700000	usd
CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-9800000	usd
CY2021	us-gaap	Property Plant And Equipment Gross Period Increase Decrease PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease	-8700000	usd
CY2021	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Period Increase Decrease AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipmentPeriodIncreaseDecrease	-1100000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	14499000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	5475000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	17757000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	180000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	144000	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	407000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	976000	usd
CY2023	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	usd
CY2022	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-13114000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	5702000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	5475000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	200000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	200000	usd
CY2023Q4	mp	Asset Retirement Obligations Estimated Undiscounted Cash Flows To Satisfy Obligation AssetRetirementObligationsEstimatedUndiscountedCashFlowsToSatisfyObligation	50200000	usd
CY2022Q4	mp	Asset Retirement Obligations Estimated Undiscounted Cash Flows To Satisfy Obligation AssetRetirementObligationsEstimatedUndiscountedCashFlowsToSatisfyObligation	50400000	usd
CY2023	mp	Accrual For Environmental Loss Contingencies Remediation Term AccrualForEnvironmentalLossContingenciesRemediationTerm	P24Y
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Discount Rate AccrualForEnvironmentalLossContingenciesDiscountRate	0.0293
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	26700000	usd
CY2022Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	27200000	usd
CY2022Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	500000	usd
CY2023Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	500000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due Within One Year AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear	536000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Second Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear	552000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Third Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear	569000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fourth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear	587000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear	605000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due After Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear	23806000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	26655000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Discount AccrualForEnvironmentalLossContingenciesDiscount	9574000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17081000	usd
CY2023Q4	mp	Asset Retirement Obligation Closure And Reclamation Obligations Financial Assurances AssetRetirementObligationClosureAndReclamationObligationsFinancialAssurances	45400000	usd
CY2022Q4	mp	Asset Retirement Obligation Closure And Reclamation Obligations Financial Assurances AssetRetirementObligationClosureAndReclamationObligationsFinancialAssurances	43500000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	10909000	usd
CY2023Q4	mp	Accrued Construction Costs Current AccruedConstructionCostsCurrent	46976000	usd
CY2022Q4	mp	Accrued Construction Costs Current AccruedConstructionCostsCurrent	39226000	usd
CY2023Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	3373000	usd
CY2022Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	281000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	9091000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	6523000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	73939000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	56939000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	8020000	usd
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	11556000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	681980000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	678444000	usd
CY2023	us-gaap	Interest Expense Debt InterestExpenseDebt	5580000	usd
CY2022	us-gaap	Interest Expense Debt InterestExpenseDebt	6146000	usd
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	9168000	usd
CY2023	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	326000	usd
CY2022	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	360000	usd
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	264000	usd
CY2023	us-gaap	Interest Expense InterestExpense	5254000	usd
CY2022	us-gaap	Interest Expense InterestExpense	5786000	usd
CY2021	us-gaap	Interest Expense InterestExpense	8904000	usd
CY2023Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	7300000	usd
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10300000	usd
CY2023Q2	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	2900000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P91M
CY2023Q2	mp	Lessee Operating Lease Number Of Renewal Options LesseeOperatingLeaseNumberOfRenewalOptions	1	renewaloption
CY2023Q2	mp	Annual Base Rent AnnualBaseRent	1200000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	1328000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	424000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	780000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	246000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	339000	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	357000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	32000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	44000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	60000	usd
CY2023	mp	Finance Lease Cost FinanceLeaseCost	278000	usd
CY2022	mp	Finance Lease Cost FinanceLeaseCost	383000	usd
CY2021	mp	Finance Lease Cost FinanceLeaseCost	417000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2134000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1509000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1163000	usd
CY2023	us-gaap	Lease Cost LeaseCost	3740000	usd
CY2022	us-gaap	Lease Cost LeaseCost	2316000	usd
CY2021	us-gaap	Lease Cost LeaseCost	2360000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y7M6D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P1Y2M12D
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P4Y4M24D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y9M18D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.069
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.060
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.063
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1452000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	228000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1472000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	179000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1362000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	59000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1370000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	54000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1403000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	54000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2663000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	106000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	9722000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	680000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1934000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	97000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	7788000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	583000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10065000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	99000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	959000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	84000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	6829000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	15000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	7788000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	99000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	591000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	451000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	195000	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	354000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	388000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	242000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	583000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	596000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	178000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	24382000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4818000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	135000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9977000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2915000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	313000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34359000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7733000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	11334000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	19236000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15851000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2879000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1447000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1574000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8455000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	17789000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	17425000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8768000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52148000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25158000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	33075000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	341152000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	160195000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6946000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	71642000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	33641000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.026
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	867000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	11395000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.027
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4288000	usd
CY2023	mp	Effective Income Tax Rate Reconciliation Officers Compensation Limitation Percent EffectiveIncomeTaxRateReconciliationOfficersCompensationLimitationPercent	0.110
CY2023	mp	Effective Income Tax Rate Reconciliation Officers Compensation Limitation Amount EffectiveIncomeTaxRateReconciliationOfficersCompensationLimitationAmount	3640000	usd
CY2022	mp	Effective Income Tax Rate Reconciliation Officers Compensation Limitation Percent EffectiveIncomeTaxRateReconciliationOfficersCompensationLimitationPercent	0.023
CY2022	mp	Effective Income Tax Rate Reconciliation Officers Compensation Limitation Amount EffectiveIncomeTaxRateReconciliationOfficersCompensationLimitationAmount	8067000	usd
CY2021	mp	Effective Income Tax Rate Reconciliation Officers Compensation Limitation Percent EffectiveIncomeTaxRateReconciliationOfficersCompensationLimitationPercent	0.017
CY2021	mp	Effective Income Tax Rate Reconciliation Officers Compensation Limitation Amount EffectiveIncomeTaxRateReconciliationOfficersCompensationLimitationAmount	2638000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	0
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	0	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.045
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-15248000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.061
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-9663000	usd
CY2023	mp	Effective Income Tax Rate Reconciliation Paycheck Protection Loan Forgiveness Percent EffectiveIncomeTaxRateReconciliationPaycheckProtectionLoanForgivenessPercent	0
CY2023	mp	Effective Income Tax Rate Reconciliation Paycheck Protection Loan Forgiveness Amount EffectiveIncomeTaxRateReconciliationPaycheckProtectionLoanForgivenessAmount	0	usd
CY2022	mp	Effective Income Tax Rate Reconciliation Paycheck Protection Loan Forgiveness Percent EffectiveIncomeTaxRateReconciliationPaycheckProtectionLoanForgivenessPercent	0
CY2022	mp	Effective Income Tax Rate Reconciliation Paycheck Protection Loan Forgiveness Amount EffectiveIncomeTaxRateReconciliationPaycheckProtectionLoanForgivenessAmount	0	usd
CY2021	mp	Effective Income Tax Rate Reconciliation Paycheck Protection Loan Forgiveness Percent EffectiveIncomeTaxRateReconciliationPaycheckProtectionLoanForgivenessPercent	-0.005
CY2021	mp	Effective Income Tax Rate Reconciliation Paycheck Protection Loan Forgiveness Amount EffectiveIncomeTaxRateReconciliationPaycheckProtectionLoanForgivenessAmount	714000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Fdii Percent EffectiveIncomeTaxRateReconciliationFdiiPercent	0
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	0	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Fdii Percent EffectiveIncomeTaxRateReconciliationFdiiPercent	0.040
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	13676000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Fdii Percent EffectiveIncomeTaxRateReconciliationFdiiPercent	0.018
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	2886000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.113
CY2023	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	3753000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.009
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	3160000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.012
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1975000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.006
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	190000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.010
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-3575000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.006
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-974000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.041
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1360000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.008
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2845000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.005
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	821000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.001
CY2023	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	38000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0
CY2022	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	usd
CY2023	mp	Effective Income Tax Rate Reconciliation State Rate Change And Other State Adjustments Percent EffectiveIncomeTaxRateReconciliationStateRateChangeAndOtherStateAdjustmentsPercent	-0.016
CY2023	mp	Effective Income Tax Rate Reconciliation State Rate Change And Other State Adjustments Amount EffectiveIncomeTaxRateReconciliationStateRateChangeAndOtherStateAdjustmentsAmount	514000	usd
CY2022	mp	Effective Income Tax Rate Reconciliation State Rate Change And Other State Adjustments Percent EffectiveIncomeTaxRateReconciliationStateRateChangeAndOtherStateAdjustmentsPercent	0
CY2022	mp	Effective Income Tax Rate Reconciliation State Rate Change And Other State Adjustments Amount EffectiveIncomeTaxRateReconciliationStateRateChangeAndOtherStateAdjustmentsAmount	0	usd
CY2021	mp	Effective Income Tax Rate Reconciliation State Rate Change And Other State Adjustments Percent EffectiveIncomeTaxRateReconciliationStateRateChangeAndOtherStateAdjustmentsPercent	0
CY2021	mp	Effective Income Tax Rate Reconciliation State Rate Change And Other State Adjustments Amount EffectiveIncomeTaxRateReconciliationStateRateChangeAndOtherStateAdjustmentsAmount	0	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	70000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-452000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-18000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.265
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8768000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.153
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52148000	usd
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.157
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25158000	usd
CY2023Q4	mp	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement And Environmental Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementAndEnvironmentalObligations	5640000	usd
CY2022Q4	mp	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement And Environmental Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementAndEnvironmentalObligations	5643000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	25107000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	0	usd
CY2023Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	15310000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	12448000	usd
CY2023Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	960000	usd
CY2022Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	691000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	5065000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3785000	usd
CY2023Q4	mp	Deferred Tax Assets Organization Costs DeferredTaxAssetsOrganizationCosts	688000	usd
CY2022Q4	mp	Deferred Tax Assets Organization Costs DeferredTaxAssetsOrganizationCosts	776000	usd
CY2023Q4	mp	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	2084000	usd
CY2022Q4	mp	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	173000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	3057000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	346000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	439000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	178000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	58350000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	24040000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1706000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	346000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	56644000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	23694000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	83834000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	36481000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	520000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1567000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	2638000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	138000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	3270000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	6604000	usd
CY2023Q4	mp	Deferred Tax Liabilities Mineral Rights DeferredTaxLiabilitiesMineralRights	97127000	usd
CY2022Q4	mp	Deferred Tax Liabilities Mineral Rights DeferredTaxLiabilitiesMineralRights	101195000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	48000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	62000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	187437000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	146047000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	130793000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	122353000	usd
CY2023Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	119600000	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	0	usd
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.04
CY2023	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2000000	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	900000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	600000	usd
CY2020Q4	mp	Capital Stock Authorized CapitalStockAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	450000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	253445000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	527510000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	331952000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	25236000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	31780000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22931000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1868000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1286000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	usd
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4256000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3185000	usd
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.153
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.157
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	177181661	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	176519203	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173469546	shares
CY2023	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	2840624	shares
CY2023	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	15584409	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	11997860	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	178152212	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	193453087	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	189844028	shares
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	15587593	shares
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	24442	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	18322	shares
CY2023	us-gaap	Net Income Loss NetIncomeLoss	24307000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	289004000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	135037000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	177181661	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	176519203	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173469546	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2023	us-gaap	Net Income Loss NetIncomeLoss	24307000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	289004000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	135037000	usd
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CY2022	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	4441000	usd
CY2021	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3366000	usd
CY2023	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	24307000	usd
CY2022	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	293445000	usd
CY2021	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	138403000	usd
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	178152212	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	193453087	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	189844028	shares
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2023	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	8300000	usd
CY2022	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	18500000	usd
CY2021	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	4800000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	2059000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	2096000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	1204000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	20105000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	18860000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4172000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	18086000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	34569000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	14082000	usd
CY2023	us-gaap	Stock Issued1 StockIssued1	8963000	usd
CY2022	us-gaap	Stock Issued1 StockIssued1	0	usd
CY2021	us-gaap	Stock Issued1 StockIssued1	0	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7690000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	168000	usd
CY2021	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 Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	371000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	42000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	88000	usd
CY2023	mp	Capital Expenditures Acquired On Seller Financed Equipment Notes CapitalExpendituresAcquiredOnSellerFinancedEquipmentNotes	0	usd
CY2022	mp	Capital Expenditures Acquired On Seller Financed Equipment Notes CapitalExpendituresAcquiredOnSellerFinancedEquipmentNotes	0	usd
CY2021	mp	Capital Expenditures Acquired On Seller Financed Equipment Notes CapitalExpendituresAcquiredOnSellerFinancedEquipmentNotes	9407000	usd
CY2023	mp	Notes Reduction Due To Revenue Recognized In Exchange NotesReductionDueToRevenueRecognizedInExchange	0	usd
CY2022	mp	Notes Reduction Due To Revenue Recognized In Exchange NotesReductionDueToRevenueRecognizedInExchange	13566000	usd
CY2021	mp	Notes Reduction Due To Revenue Recognized In Exchange NotesReductionDueToRevenueRecognizedInExchange	54802000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	3401000	usd
CY2023	mp	Increase Decrease In Estimates Of Asset Retirement Costs IncreaseDecreaseInEstimatesOfAssetRetirementCosts	0	usd
CY2022	mp	Increase Decrease In Estimates Of Asset Retirement Costs IncreaseDecreaseInEstimatesOfAssetRetirementCosts	-10395000	usd
CY2021	mp	Increase Decrease In Estimates Of Asset Retirement Costs IncreaseDecreaseInEstimatesOfAssetRetirementCosts	-8713000	usd
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023	dei	Auditor Name AuditorName	KPMG LLP
CY2023	dei	Auditor Location AuditorLocation	Denver, CO
CY2023	dei	Auditor Firm AuditorFirmId	185

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$MP
MP Materials Corp. / DE Stock $mp

2024 Q1 Form 10-K Financial Statement

#000180136824000014 Filed on February 28, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MP MP Materials Corp. / DE Stock $mp

2024 Q1 Form 10-K Financial Statement

#000180136824000014 Filed on February 28, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MP
MP Materials Corp. / DE Stock $mp