$GTHP
GUIDED THERAPEUTICS INC Stock $gthp

$gthp Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000147793223001899 Filed on March 30, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$22.00K	$0.00	$13.00K
YoY Change	340.0%	-100.0%	-83.95%
Cost Of Revenue	$9.000K	$79.00K	$81.00K
YoY Change	800.0%	315.79%	32.79%
Gross Profit	$13.00K	-$79.00K	-$68.00K
YoY Change	225.0%	-292.68%	-440.0%
Gross Profit Margin	59.09%		-523.08%
Selling, General & Admin	$849.0K	$830.0K	$3.188M
YoY Change	99.3%	80.83%	37.83%
% of Gross Profit	6530.77%
Research & Development	$7.000K	$39.00K	$77.00K
YoY Change	-66.67%	129.41%	11.59%
% of Gross Profit	53.85%
Depreciation & Amortization	$2.000K	$3.000K	$4.000K
YoY Change			300.0%
% of Gross Profit	15.38%
Operating Expenses	$856.0K	$869.0K	$3.265M
YoY Change	91.5%	82.56%	37.07%
Operating Profit	-$843.0K	-$948.0K	-$3.333M
YoY Change	90.29%	117.93%	41.11%
Interest Expense	$66.00K	-$56.00K	$582.0K
YoY Change	-34.65%	-45.1%	-49.39%
% of Operating Profit
Other Income/Expense, Net	-$26.00K	$11.00K	-$1.008M
YoY Change	-1400.0%	-88.17%	-445.21%
Pretax Income	-$869.0K	-$1.807M	-$4.341M
YoY Change	71.4%	306.98%	109.71%
Income Tax	$0.00	$0.00	$0.00
% Of Pretax Income
Net Earnings	-$869.0K	-$1.857M	-$4.341M
YoY Change	71.4%	318.24%	109.71%
Net Earnings / Revenue	-3950.0%		-33392.31%
Basic Earnings Per Share	-$0.02		-$0.15
Diluted Earnings Per Share	-$0.02	-$0.04	-$0.15
COMMON SHARES
Basic Shares Outstanding	50.51M shares	48.58M shares	32.51M shares
Diluted Shares Outstanding	49.30M shares		32.51M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.837M	$2.313M	$2.313M
YoY Change	153.38%	259.72%	259.72%
Cash & Equivalents	$1.837M	$2.313M	$2.313M
Short-Term Investments
Other Short-Term Assets	$121.0K	$137.0K	$137.0K
YoY Change	-73.29%	-63.66%	-63.66%
Inventory	$585.0K	$548.0K	$548.0K
Prepaid Expenses
Receivables	$7.000K	$6.000K	$6.000K
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.550M	$3.004M	$3.004M
YoY Change	42.7%	83.51%	83.51%
LONG-TERM ASSETS
Property, Plant & Equipment	$40.00K	$42.00K	$345.0K
YoY Change	42.86%	200.0%	-10.62%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$17.00K	$17.00K	$17.00K
YoY Change	0.0%	0.0%	0.0%
Total Long-Term Assets	$342.0K	$362.0K	$362.0K
YoY Change	-14.5%	-10.17%	-10.17%
TOTAL ASSETS
Total Short-Term Assets	$2.550M	$3.004M	$3.004M
Total Long-Term Assets	$342.0K	$362.0K	$362.0K
Total Assets	$2.892M	$3.366M	$3.366M
YoY Change	32.24%	65.0%	65.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.191M	$2.186M	$2.225M
YoY Change	-14.28%	-7.45%	-9.15%
Accrued Expenses	$928.0K	$1.247M	$1.095M
YoY Change	-7.11%	-29.47%	-26.31%
Deferred Revenue
YoY Change
Short-Term Debt	$248.0K	$288.0K	$288.0K
YoY Change	-68.53%	-65.05%	-65.05%
Long-Term Debt Due	$0.00	$17.00K	$521.0K
YoY Change	-100.0%	-80.68%	109.24%
Total Short-Term Liabilities	$4.003M	$4.869M	$4.869M
YoY Change	-26.54%	-14.49%	-14.49%
LONG-TERM LIABILITIES
Long-Term Debt	$1.519M	$0.00	$1.129M
YoY Change	6.97%	-100.0%	-21.27%
Other Long-Term Liabilities	$225.0K	$251.0K	$251.0K
YoY Change	-26.71%	-29.69%	-29.69%
Total Long-Term Liabilities	$1.744M	$1.380M	$1.380M
YoY Change	0.98%	-22.95%	-22.95%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.003M	$4.869M	$4.869M
Total Long-Term Liabilities	$1.744M	$1.380M	$1.380M
Total Liabilities	$5.747M	$6.249M	$6.249M
YoY Change	-19.91%	-16.51%	-16.51%
SHAREHOLDERS EQUITY
Retained Earnings	-$148.3M	-$147.4M
YoY Change	3.41%	3.49%
Common Stock	$3.438M	$3.437M
YoY Change	0.82%	1.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$132.0K	$132.0K
YoY Change		0.0%
Treasury Stock Shares
Shareholders Equity	-$2.855M	-$2.883M	-$2.883M
YoY Change
Total Liabilities & Shareholders Equity	$2.892M	$3.366M	$3.366M
YoY Change	32.24%	65.0%	65.0%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	-$869.0K	-$1.857M	-$4.341M
YoY Change	71.4%	318.24%	109.71%
Depreciation, Depletion And Amortization	$2.000K	$3.000K	$4.000K
YoY Change			300.0%
Cash From Operating Activities	-$499.0K	-$338.0K	-$1.478M
YoY Change	178.77%	-312.58%	-7.16%
INVESTING ACTIVITIES
Capital Expenditures	$0.00	$3.000K	$31.00K
YoY Change	-100.0%	-175.0%	121.43%
Acquisitions
YoY Change
Other Investing Activities	$0.00
YoY Change
Cash From Investing Activities	$0.00	-$3.000K	-$31.00K
YoY Change	-100.0%	-25.0%	121.43%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$1.392M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$23.00K	-42.00K	$3.180M
YoY Change	-91.64%	-20.75%	53.85%
NET CHANGE
Cash From Operating Activities	-$499.0K	-338.0K	-$1.478M
Cash From Investing Activities	$0.00	-3.000K	-$31.00K
Cash From Financing Activities	$23.00K	-42.00K	$3.180M
Net Change In Cash	-$476.0K	-383.0K	$1.671M
YoY Change	-680.49%	-475.49%	262.47%
FREE CASH FLOW
Cash From Operating Activities	-$499.0K	-$338.0K	-$1.478M
Capital Expenditures	$0.00	$3.000K	$31.00K
Free Cash Flow	-$499.0K	-$341.0K	-$1.509M
YoY Change	158.55%	-309.2%	-6.04%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	us-gaap	Gross Profit GrossProfit	20000	usd
CY2022	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	77000	usd
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	126801000	usd
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	132000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-142387000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2040000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3007000	usd
CY2021	us-gaap	Operating Expenses OperatingExpenses	2382000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-2362000	usd
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000924515
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	48596000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	13673000	shares
CY2021Q4	gthp	Share Outstanding One ShareOutstandingOne	13673583	shares
CY2022	gthp	Common Shares Issued CommonSharesIssued	34922132	shares
CY2022Q4	gthp	Common Stocks Shares Issued CommonStocksSharesIssued	48595715	shares
CY2021Q4	gthp	Common Stocks Shares Issued CommonStocksSharesIssued	13673583	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.47
CY2022Q4	us-gaap	Notes Payable NotesPayable	0	usd
CY2022Q4	gthp	Current Portion Of Long Term Debt Related Parties CurrentPortionOfLongTermDebtRelatedParties	504000	usd
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	0-22179
CY2022	dei	Entity Registrant Name EntityRegistrantName	GUIDED THERAPEUTICS, INC.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	58-2029543
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	5835 Peachtree Corners East
CY2022	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite B
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Norcross
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	GA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	30092
CY2022	dei	City Area Code CityAreaCode	678
CY2022	dei	Local Phone Number LocalPhoneNumber	329-7933
CY2022	dei	Security12g Title Security12gTitle	Common Stock, $0.001 Par Value
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	true
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	7101547	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	50505463	shares
CY2022	dei	Auditor Firm AuditorFirmId	1195
CY2022	dei	Auditor Name AuditorName	UHY LLP
CY2022	dei	Auditor Location AuditorLocation	Sterling Heights, Michigan
CY2022Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	48000	usd
CY2021Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	126000	usd
CY2022Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	818000	usd
CY2021Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	785000	usd
CY2021Q4	gthp	Current Portion Of Long Term Debt Related Parties CurrentPortionOfLongTermDebtRelatedParties	0	usd
CY2022Q4	us-gaap	Convertible Notes Payable Current ConvertibleNotesPayableCurrent	0	usd
CY2021Q4	us-gaap	Convertible Notes Payable Current ConvertibleNotesPayableCurrent	161000	usd
CY2022Q4	gthp	Short Term Convertible Notes Payable Including Nonconvertible Penalty ShortTermConvertibleNotesPayableIncludingNonconvertiblePenalty	230000	usd
CY2021Q4	gthp	Short Term Convertible Notes Payable Including Nonconvertible Penalty ShortTermConvertibleNotesPayableIncludingNonconvertiblePenalty	736000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4869000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	5694000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	246000	usd
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	325000	usd
CY2022Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	5000	usd
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	32000	usd
CY2022Q4	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	1046000	usd
CY2021Q4	us-gaap	Convertible Debt Noncurrent ConvertibleDebtNoncurrent	820000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	0	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	22000	usd
CY2022Q4	us-gaap	Due To Related Parties Noncurrent DueToRelatedPartiesNoncurrent	83000	usd
CY2021Q4	us-gaap	Due To Related Parties Noncurrent DueToRelatedPartiesNoncurrent	592000	usd
CY2022Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1380000	usd
CY2021Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1791000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	6249000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	7485000	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	48596000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	13673000	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	3437000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	3403000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	138090000	usd
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	132000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-147359000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	-2883000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	-5445000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3366000	usd
CY2022	us-gaap	Revenues Revenues	13000	usd
CY2021	us-gaap	Revenues Revenues	81000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	81000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	61000	usd
CY2022	us-gaap	Gross Profit GrossProfit	-68000	usd
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	69000	usd
CY2022	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	181000	usd
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	141000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	2172000	usd
CY2022	us-gaap	Operating Expenses OperatingExpenses	3265000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	-3333000	usd
CY2022	us-gaap	Interest Expense InterestExpense	582000	usd
CY2021	us-gaap	Interest Expense InterestExpense	1150000	usd
CY2022	gthp	Change In Fair Value Of Derivative Liability ChangeInFairValueOfDerivativeLiability	27000	usd
CY2021	gthp	Change In Fair Value Of Derivative Liability ChangeInFairValueOfDerivativeLiability	-91000	usd
CY2022	gthp	Gain Loss From Extinguishment Of Debt GainLossFromExtinguishmentOfDebt	-469000	usd
CY2021	gthp	Gain Loss From Extinguishment Of Debt GainLossFromExtinguishmentOfDebt	578000	usd
CY2022	gthp	Change In Fair Value Of Warrants ChangeInFairValueOfWarrants	0	usd
CY2021	gthp	Change In Fair Value Of Warrants ChangeInFairValueOfWarrants	448000	usd
CY2022	us-gaap	Other Income OtherIncome	16000	usd
CY2021	us-gaap	Other Income OtherIncome	507000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1008000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	292000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-4341000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-2070000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Dividends Preferred Stock DividendsPreferredStock	631000	usd
CY2021	us-gaap	Dividends Preferred Stock DividendsPreferredStock	361000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-4972000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2431000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.15
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.18
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.15
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.18
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32505000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13377000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32505000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13377000	shares
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	-5445000	usd
CY2022	gthp	Common Stock Warrants Exercised Amount CommonStockWarrantsExercisedAmount	846000	usd
CY2022	gthp	Issuances Of Common Stock To Investors Amount IssuancesOfCommonStockToInvestorsAmount	1429000	usd
CY2022	gthp	Adjustment Of Additional Paid In Capital Issuances Of Warrants To Investors AdjustmentOfAdditionalPaidInCapitalIssuancesOfWarrantsToInvestors	1795000	usd
CY2022	gthp	Issuance Of Common Stock For Payment Of Series D Preferred Dividends Amount IssuanceOfCommonStockForPaymentOfSeriesDPreferredDividendsAmount	47000	usd
CY2022	gthp	Issuance Of Common Stock For Payment Of Series E Preferred Dividends IssuanceOfCommonStockForPaymentOfSeriesEPreferredDividends	102000	usd
CY2022	gthp	Issuance Of Common Stock For Payment Of Series F Preferred Dividends Amount IssuanceOfCommonStockForPaymentOfSeriesFPreferredDividendsAmount	107000	usd
CY2022	gthp	Issuance Of Common Stock For Payment Of Series F2 Preferred Dividends Amount IssuanceOfCommonStockForPaymentOfSeriesF2PreferredDividendsAmount	75000	usd
CY2022	gthp	Issuance Of Common Stock For Payment Of Interest Amount IssuanceOfCommonStockForPaymentOfInterestAmount	150000	usd
CY2022	gthp	Issuance Of Common Stock For Series F And Series F2 One Time15 Dividends Amount IssuanceOfCommonStockForSeriesFAndSeriesF2OneTime15DividendsAmount	400000	usd
CY2022	gthp	Conversion Of Series C2 Preferred Stock To Common Stock Amount ConversionOfSeriesC2PreferredStockToCommonStockAmount	0	usd
CY2022	gthp	Conversion Of Series D Preferred Stock To Common Stock Amount ConversionOfSeriesDPreferredStockToCommonStockAmount	0	usd
CY2022	gthp	Conversion Of Series E Preferred Stock To Common Stock Amount ConversionOfSeriesEPreferredStockToCommonStockAmount	0	usd
CY2022	gthp	Conversion Of Series F Preferred Stock To Common Stock Amount ConversionOfSeriesFPreferredStockToCommonStockAmount	0	usd
CY2022	gthp	Conversion Of Series F2 Preferred Stock To Common Stock Amount ConversionOfSeriesF2PreferredStockToCommonStockAmount	0	usd
CY2022	gthp	Stockbasedcompensation Stockbasedcompensation	176000	usd
CY2022	gthp	Issuances Of Warrants To Consultants IssuancesOfWarrantsToConsultants	1204000	usd
CY2022	gthp	Issuance Of Common Stock For Payment Of Interests Amount IssuanceOfCommonStockForPaymentOfInterestsAmount	1203000	usd
CY2022	gthp	Accruedpreferreddividends Accruedpreferreddividends	-631000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	-4341000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	-2883000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	-10855000	usd
CY2021	gthp	Series F Preferred Offering SeriesFPreferredOffering	1195000	usd
CY2021	gthp	Series F2 Preferred Offering SeriesF2PreferredOffering	404000	usd
CY2021	gthp	Conversion Of Debt And Expenses For Series F2 Preferred Stock ConversionOfDebtAndExpensesForSeriesF2PreferredStock	2559000	usd
CY2021	gthp	Issuance Of Common Stock To Finders Amount IssuanceOfCommonStockToFindersAmount	54000	usd
CY2021	gthp	Series G Preferred Offering SeriesGPreferredOffering	0	usd
CY2021	gthp	Series G Redemptionamount SeriesGRedemptionamount	0	usd
CY2021	gthp	Issuance Of Common Stock For Payment Of Series D Preferred Dividends Amount IssuanceOfCommonStockForPaymentOfSeriesDPreferredDividendsAmount	53000	usd
CY2021	gthp	Issuance Of Common Stock For Payment Of Series E Preferred Dividends IssuanceOfCommonStockForPaymentOfSeriesEPreferredDividends	118000	usd
CY2021	gthp	Issuanceofwarrantstoconsultantsamount Issuanceofwarrantstoconsultantsamount	1172000	usd
CY2021	gthp	Warrants Issued With Debt WarrantsIssuedWithDebt	304000	usd
CY2021	gthp	Conversion Of Warrant From Liabilities To Equity ConversionOfWarrantFromLiabilitiesToEquity	1755000	usd
CY2021	gthp	Conversion Of Warrants From Liabilities To Equity ConversionOfWarrantsFromLiabilitiesToEquity	0	usd
CY2021	gthp	Stockbasedcompensation Stockbasedcompensation	227000	usd
CY2021	gthp	Accruedpreferreddividends Accruedpreferreddividends	-361000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-2070000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	-5445000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	-4341000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-2071000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	23000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	usd
CY2022	gthp	Inventory Reserve InventoryReserve	81000	usd
CY2021	gthp	Inventory Reserve InventoryReserve	0	usd
CY2022	us-gaap	Depreciation Depreciation	4000	usd
CY2021	us-gaap	Depreciation Depreciation	1000	usd
CY2022	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	143000	usd
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	320000	usd
CY2022	gthp	Amortization Of Beneficial Conversion Feature AmortizationOfBeneficialConversionFeature	0	usd
CY2021	gthp	Amortization Of Beneficial Conversion Feature AmortizationOfBeneficialConversionFeature	8000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	176000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	228000	usd
CY2022	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0	usd
CY2021	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-448000	usd
CY2022	gthp	Extinguishment Of Derivative Liabilities ExtinguishmentOfDerivativeLiabilities	0	usd
CY2021	gthp	Extinguishment Of Derivative Liabilities ExtinguishmentOfDerivativeLiabilities	-84000	usd
CY2022	gthp	Change In Fair Value Of Derivatives ChangeInFairValueOfDerivatives	27000	usd
CY2021	gthp	Change In Fair Value Of Derivatives ChangeInFairValueOfDerivatives	-91000	usd
CY2022	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	68000	usd
CY2021	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	82000	usd
CY2022	gthp	Expense For Warrants Issued To Consultants ExpenseForWarrantsIssuedToConsultants	1205000	usd
CY2021	gthp	Expense For Warrants Issued To Consultants ExpenseForWarrantsIssuedToConsultants	664000	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-655000	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	gthp	Gain From Forgiveness Of Debt GainFromForgivenessOfDebt	186000	usd
CY2021	gthp	Gain From Forgiveness Of Debt GainFromForgivenessOfDebt	578000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-172000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-117000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-16000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	22000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	58000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-33000	usd
CY2022	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-363000	usd
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	292000	usd
CY2022	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	0	usd
CY2021	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	17000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	123000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	136000	usd
CY2022	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-67000	usd
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-56000	usd
CY2022	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	172000	usd
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	296000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1478000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1592000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	31000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-31000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-14000	usd
CY2022	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	532000	usd
CY2021	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	usd
CY2022	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	0	usd
CY2021	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	1248000	usd
CY2022	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	540000	usd
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1468000	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	86000	usd
CY2022	gthp	Note Payable Default Penalty NotePayableDefaultPenalty	0	usd
CY2021	gthp	Note Payable Default Penalty NotePayableDefaultPenalty	398000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1392000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	1796000	usd
CY2021	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	usd
CY2022	gthp	Proceeds From Issuance Of Common Stock Net Of Costs ProceedsFromIssuanceOfCommonStockNetOfCosts	0	usd
CY2021	gthp	Proceeds From Issuance Of Common Stock Net Of Costs ProceedsFromIssuanceOfCommonStockNetOfCosts	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	1436000	usd
CY2022	gthp	Proceeds From Series F2 Offering Net Of Costs ProceedsFromSeriesF2OfferingNetOfCosts	0	usd
CY2021	gthp	Proceeds From Series F2 Offering Net Of Costs ProceedsFromSeriesF2OfferingNetOfCosts	539000	usd
CY2022	gthp	Proceeds From Series G Offering Net Of Costs ProceedsFromSeriesGOfferingNetOfCosts	0	usd
CY2021	gthp	Proceeds From Series G Offering Net Of Costs ProceedsFromSeriesGOfferingNetOfCosts	125000	usd
CY2022	gthp	Redemption Of Series G Preferred Stock RedemptionOfSeriesGPreferredStock	0	usd
CY2021	gthp	Redemption Of Series G Preferred Stock RedemptionOfSeriesGPreferredStock	125000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3180000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2067000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	1671000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	461000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	643000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2314000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	643000	usd
CY2022	us-gaap	Interest Paid InterestPaid	149000	usd
CY2021	us-gaap	Interest Paid InterestPaid	557000	usd
CY2022	us-gaap	Dividends Preferred Stock Stock DividendsPreferredStockStock	631000	usd
CY2021	us-gaap	Dividends Preferred Stock Stock DividendsPreferredStockStock	361000	usd
CY2022	gthp	Settlement Of Interest Through Common Stock Issuance SettlementOfInterestThroughCommonStockIssuance	151000	usd
CY2021	gthp	Settlement Of Interest Through Common Stock Issuance SettlementOfInterestThroughCommonStockIssuance	0	usd
CY2022	us-gaap	Notes Issued1 NotesIssued1	0	usd
CY2021	us-gaap	Notes Issued1 NotesIssued1	323000	usd
CY2022	gthp	Issuance Of Series F2 Preferred Stock IssuanceOfSeriesF2PreferredStock	0	usd
CY2021	gthp	Issuance Of Series F2 Preferred Stock IssuanceOfSeriesF2PreferredStock	2236000	usd
CY2022	gthp	Issuance Of Warrants To Finders In Connection With Series F And Series F2 Preferred Stock IssuanceOfWarrantsToFindersInConnectionWithSeriesFAndSeriesF2PreferredStock	0	usd
CY2021	gthp	Issuance Of Warrants To Finders In Connection With Series F And Series F2 Preferred Stock IssuanceOfWarrantsToFindersInConnectionWithSeriesFAndSeriesF2PreferredStock	377000	usd
CY2022	gthp	Settlement Of Dividends Through Common Stock Issuance SettlementOfDividendsThroughCommonStockIssuance	730000	usd
CY2021	gthp	Settlement Of Dividends Through Common Stock Issuance SettlementOfDividendsThroughCommonStockIssuance	171000	usd
CY2022	gthp	Settlement Of Accounts Payable Through Common Stock Issuance SettlementOfAccountsPayableThroughCommonStockIssuance	0	usd
CY2021	gthp	Settlement Of Accounts Payable Through Common Stock Issuance SettlementOfAccountsPayableThroughCommonStockIssuance	62000	usd
CY2022	gthp	Warrants Exchanged For Fixed Price Warrants WarrantsExchangedForFixedPriceWarrants	0	usd
CY2021	gthp	Warrants Exchanged For Fixed Price Warrants WarrantsExchangedForFixedPriceWarrants	1755000	usd
CY2022	gthp	Warrants Issued With Debt WarrantsIssuedWithDebt	0	usd
CY2021	gthp	Warrants Issued With Debt WarrantsIssuedWithDebt	304000	usd
CY2022	gthp	Settlement Of Accounts Payable Through Issuance Of Promissory Note SettlementOfAccountsPayableThroughIssuanceOfPromissoryNote	0	usd
CY2021	gthp	Settlement Of Accounts Payable Through Issuance Of Promissory Note SettlementOfAccountsPayableThroughIssuanceOfPromissoryNote	97000	usd
CY2022	gthp	Stock Issued During Period Value Issued For Debt Repayment StockIssuedDuringPeriodValueIssuedForDebtRepayment	0	usd
CY2021	gthp	Stock Issued During Period Value Issued For Debt Repayment StockIssuedDuringPeriodValueIssuedForDebtRepayment	0	usd
CY2022	gthp	Conversion Of Series C2 Preferred Shares Into Common Stock ConversionOfSeriesC2PreferredSharesIntoCommonStock	92000	usd
CY2021	gthp	Conversion Of Series C2 Preferred Shares Into Common Stock ConversionOfSeriesC2PreferredSharesIntoCommonStock	0	usd
CY2022	gthp	Conversion Of Series D Preferred Shares Into Common Stock ConversionOfSeriesDPreferredSharesIntoCommonStock	118000	usd
CY2021	gthp	Conversion Of Series D Preferred Shares Into Common Stock ConversionOfSeriesDPreferredSharesIntoCommonStock	0	usd
CY2022	gthp	Conversion Of Series E Preferred Shares Into Common Stock ConversionOfSeriesEPreferredSharesIntoCommonStock	800000	usd
CY2021	gthp	Conversion Of Series E Preferred Shares Into Common Stock ConversionOfSeriesEPreferredSharesIntoCommonStock	0	usd
CY2022	gthp	Conversion Of Series F Preferred Shares Into Common Stock ConversionOfSeriesFPreferredSharesIntoCommonStock	308000	usd
CY2021	gthp	Conversion Of Series F Preferred Shares Into Common Stock ConversionOfSeriesFPreferredSharesIntoCommonStock	8000	usd
CY2022	gthp	Conversion Of Series F2 Preferred Shares Into Common Stock ConversionOfSeriesF2PreferredSharesIntoCommonStock	2473000	usd
CY2021	gthp	Conversion Of Series F2 Preferred Shares Into Common Stock ConversionOfSeriesF2PreferredSharesIntoCommonStock	0	usd
CY2022	gthp	Directors And Officer Insurance Obtained With Financing DirectorsAndOfficerInsuranceObtainedWithFinancing	124000	usd
CY2021	gthp	Directors And Officer Insurance Obtained With Financing DirectorsAndOfficerInsuranceObtainedWithFinancing	0	usd
CY2021Q4	gthp	Decrease In Authorized Common Share DecreaseInAuthorizedCommonShare	500000000	shares
CY2022Q4	gthp	Working Capital Deficit WorkingCapitalDeficit	1900000	usd
CY2022	gthp	Net Loss Including Preferred Dividend NetLossIncludingPreferredDividend	5000000.0	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	3200000	usd
CY2022	gthp	Proceeds From Warrant Exercises1 ProceedsFromWarrantExercises1	495000	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant areas where estimates are used include the allowance for doubtful accounts, inventory valuation and input variables for Black-Scholes, Monte Carlo simulations and binomial calculations. The Company uses the Monte Carlo simulations and binomial calculations in the calculation of the fair value of the warrant liabilities and the valuation of freestanding warrants.</p>
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;">The Company maintains cash balances in several financial institutions that are insured by the Federal Deposit Insurance Corporation up to certain federal limitations. At times, the Company’s cash balance exceeds these federal limitations. The amount in excess of insured limitations was approximately $2,064,772 and $392,569 as of December 31, 2022 and 2021, respectively.</p>
CY2022Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	2064772	usd
CY2021Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	392569	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	14000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	466000	usd
CY2022Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	1260000	usd
CY2021Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	1255000	usd
CY2022Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	68000	usd
CY2021Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	69000	usd
CY2022Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	38000	usd
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	32000	usd
CY2022Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	818000	usd
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	785000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	548000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	571000	usd
CY2022Q4	gthp	Subtotal Subtotal	1792000	usd
CY2021Q4	gthp	Subtotal Subtotal	1761000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1750000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1747000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	42000	usd
CY2022	gthp	Costs Incurred In Filing CostsIncurredInFiling	5400	usd
CY2021	gthp	Costs Incurred In Filing CostsIncurredInFiling	14800	usd
CY2022Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	444000	usd
CY2021Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	621000	usd
CY2022Q4	us-gaap	Accrued Professional Fees Current And Noncurrent AccruedProfessionalFeesCurrentAndNoncurrent	285000	usd
CY2021Q4	us-gaap	Accrued Professional Fees Current And Noncurrent AccruedProfessionalFeesCurrentAndNoncurrent	98000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	189000	usd
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	261000	usd
CY2022Q4	us-gaap	Accrued Vacation Current And Noncurrent AccruedVacationCurrentAndNoncurrent	41000	usd
CY2021Q4	us-gaap	Accrued Vacation Current And Noncurrent AccruedVacationCurrentAndNoncurrent	39000	usd
CY2022Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	231000	usd
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	349000	usd
CY2022Q4	gthp	Accrued Stock Subscription Payable AccruedStockSubscriptionPayable	36000	usd
CY2021Q4	gthp	Accrued Stock Subscription Payable AccruedStockSubscriptionPayable	351000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	21000	usd
CY2021Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	49000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	1247000	usd
CY2021Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	1768000	usd
CY2022Q4	us-gaap	Deferred Revenue DeferredRevenue	509101	usd
CY2021Q4	us-gaap	Deferred Revenue DeferredRevenue	337315	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	326016	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	16390000	usd
CY2022Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	54484	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	48172	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	6312	usd
CY2021Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	171153	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	125584	usd
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	45569	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	65600000	usd
CY2022	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.500	pure
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	-5000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	-32000	usd
CY2022	gthp	Summary Of Changes To Level3 Instruments SummaryOfChangesToLevel3Instruments	<table cellpadding="0" style="border-spacing:0;text-align:left;font:10pt times new roman;width:100%"><tbody><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="10" style="BORDER-BOTTOM: #000000 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="font-size:10pt;font-family:times new roman;margin:0px"><strong>(in thousands)</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>Senior Secured</strong></p></td><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: #000000 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong> Debt</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: #000000 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>Derivative</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: #000000 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>Total</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" colspan="2" style="width:9%;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" colspan="2" style="width:9%;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" colspan="2" style="width:9%;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px"><strong>Balance, December 31, 2021</strong></p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">$</td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">-</td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">$</td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">(32</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">)</td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">$</td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">(32</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">)</td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Change in fair value during the year</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="BORDER-BOTTOM: 1px solid;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="BORDER-BOTTOM: 1px solid;width:9%;vertical-align:bottom;text-align:right;">-</td><td style="PADDING-BOTTOM: 1px;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="BORDER-BOTTOM: 1px solid;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="BORDER-BOTTOM: 1px solid;width:9%;vertical-align:bottom;text-align:right;">27</td><td style="PADDING-BOTTOM: 1px;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="BORDER-BOTTOM: 1px solid;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="BORDER-BOTTOM: 1px solid;width:9%;vertical-align:bottom;text-align:right;">27</td><td style="PADDING-BOTTOM: 1px;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#cceeff"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px"><strong>Balance, December 31, 2022</strong></p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="BORDER-BOTTOM: 3px double;width:1%;vertical-align:bottom;white-space: nowrap;"><strong>$</strong></td><td class="ffcell" style="BORDER-BOTTOM: 3px double;width:9%;vertical-align:bottom;text-align:right;"><strong>-</strong></td><td style="PADDING-BOTTOM: 3px;width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="BORDER-BOTTOM: 3px double;width:1%;vertical-align:bottom;white-space: nowrap;"><strong>$</strong></td><td class="ffcell" style="BORDER-BOTTOM: 3px double;width:9%;vertical-align:bottom;text-align:right;"><strong>(5</strong></td><td style="PADDING-BOTTOM: 3px;width:1%;vertical-align:bottom;white-space: nowrap;"><strong>)</strong></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="BORDER-BOTTOM: 3px double;width:1%;vertical-align:bottom;white-space: nowrap;"><strong>$</strong></td><td class="ffcell" style="BORDER-BOTTOM: 3px double;width:9%;vertical-align:bottom;text-align:right;"><strong>(5</strong></td><td style="PADDING-BOTTOM: 3px;width:1%;vertical-align:bottom;white-space: nowrap;"><strong>)</strong></td></tr></tbody></table>
CY2022Q4	gthp	Common Stock Shares Issued1 CommonStockSharesIssued1	6711540	shares
CY2022Q4	gthp	Aggregate Shares Of Common Stock AggregateSharesOfCommonStock	6711540	usd
CY2022Q3	us-gaap	Stock Option Exercise Price Increase StockOptionExercisePriceIncrease	0.65
CY2022Q4	gthp	Aggregate Purchase Price AggregatePurchasePrice	3355270	usd
CY2022Q4	gthp	Common Stock Shares Authorized Shares CommonStockSharesAuthorizedShares	500000000	shares
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	gthp	Common Stocks Shares Outstanding CommonStocksSharesOutstanding	48595715	shares
CY2021Q4	gthp	Common Stocks Shares Outstanding CommonStocksSharesOutstanding	13673583	shares
CY2022	us-gaap	Common Stock Dividends Shares CommonStockDividendsShares	34922132	shares
CY2021	us-gaap	Stock Issued During Period Shares Other StockIssuedDuringPeriodSharesOther	535301	shares
CY2021	gthp	Shares Issued For Payment Of Series D Dividends SharesIssuedForPaymentOfSeriesDDividends	109039	shares
CY2021	gthp	Shares Issued For Payment Of Series E Dividends SharesIssuedForPaymentOfSeriesEDividends	288262	shares
CY2021	us-gaap	Stock Issued During Period Shares Issued For Services StockIssuedDuringPeriodSharesIssuedForServices	98000	shares
CY2021	us-gaap	Conversion Of Stock Shares Issued1 ConversionOfStockSharesIssued1	40000	shares
CY2021	us-gaap	Common Stock Dividends Shares CommonStockDividendsShares	535301	shares
CY2022	us-gaap	Common Stock Dividends Shares CommonStockDividendsShares	34922132	shares
CY2020Q4	gthp	Share Outstanding One ShareOutstandingOne	13138282	shares
CY2021	gthp	Common Shares Issued CommonSharesIssued	535301	shares
CY2022Q4	gthp	Share Outstanding One ShareOutstandingOne	48595715	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	28324275	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0.25
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Granted ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	7982223	shares
CY2021	gthp	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Warrant Issued ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceWarrantIssued	0.30
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures And Expirations ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations	1729662	shares
CY2021	gthp	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price Expired ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePriceExpired	0.04
CY2021	gthp	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Warrants Exchanged ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWarrantsExchanged	-4713603	usd
CY2021	gthp	Share Based Compensation Arrangement By Share Based Payment Award Options For Exchange In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForExchangeInPeriodWeightedAverageExercisePrice	0.20
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised	2193599	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0.16
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	27669634	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0.29
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Granted ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	24223080	shares
CY2022	gthp	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Warrant Issued ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceWarrantIssued	0.54
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures And Expirations ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations	4450866	shares
CY2022	gthp	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price Expired ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePriceExpired	0.54
CY2022	gthp	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Warrants Exchanged ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWarrantsExchanged	-8775000	usd
CY2022	gthp	Share Based Compensation Arrangement By Share Based Payment Award Options For Exchange In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForExchangeInPeriodWeightedAverageExercisePrice	0.19
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised	3079868	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0.17
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	35586980	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0.46
CY2022	gthp	Schedule Of Fair Value Warrants Issued Under Black Scholes Option Pricing Model Table Textblock ScheduleOfFairValueWarrantsIssuedUnderBlackScholesOptionPricingModelTableTextblock	<table cellpadding="0" style="border-spacing:0;text-align:left;font:10pt times new roman;margin-left:auto;margin-right:auto;width:80%"><tbody><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>December 31,</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: 1px solid;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>2022</strong></p></td><td style="PADDING-BOTTOM: 1px;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:bottom;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Expected term</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:right;">3.8 Years</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Volatility</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:12%;vertical-align:bottom;text-align:right;">148.4</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Risk-free interest rate</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="vertical-align:bottom;text-align:right;">3.6</td><td style="vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Dividend yield</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="vertical-align:bottom;text-align:right;">0.00</td><td style="vertical-align:bottom;white-space: nowrap;">%</td></tr></tbody></table><table cellpadding="0" style="border-spacing:0;text-align:left;font:10pt times new roman;margin-left:auto;margin-right:auto;width:80%"><tbody><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px 0px 0px 0in; text-align:center;"><strong>December 31,</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: 1px solid;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px 0px 0px 0in; text-align:center;"><strong>2021</strong></p></td><td style="PADDING-BOTTOM: 1px;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:bottom;"><p style="font-size:10pt;font-family:times new roman;margin:0px 0px 0px 0in">Expected term</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px 0px 0px 0in; text-align:right;">15 years</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px 0px 0px 0in">Volatility</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:12%;vertical-align:bottom;text-align:right;">142.2</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px 0px 0px 0in">Risk-free interest rate</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="vertical-align:bottom;text-align:right;">0.0</td><td style="vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px 0px 0px 0in">Dividend yield</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="vertical-align:bottom;text-align:right;">0.00</td><td style="vertical-align:bottom;white-space: nowrap;">%</td></tr></tbody></table>
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P3Y9M18D
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	1.484	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.036	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0000	pure
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P15Y
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	1.422	pure
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.000	pure
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0000	pure
CY2022	gthp	Options Granted Exercisable Term OptionsGrantedExercisableTerm	four years
CY2022	gthp	Options Granted Expiration Term OptionsGrantedExpirationTerm	ten years
CY2022Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.10	pure
CY2022	gthp	Stock Based Compensation Expense StockBasedCompensationExpense	175673	usd
CY2021	gthp	Stock Based Compensation Expense StockBasedCompensationExpense	226717	usd
CY2022	gthp	Area Of Operating Leases AreaOfOperatingLeases	12,835
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	109404	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	110701	usd
CY2021	gthp	Outstanding At Beginning Of Year OutstandingAtBeginningOfYear	1800000	shares
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	0.49
CY2021	gthp	Options Granted OptionsGranted	25000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.48
CY2021	gthp	Share Based Compensation Arrangement By Share Based Payment Award Option Forfeiture In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureInPeriod	-167614	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0.49
CY2021	gthp	Share Based Compensation Arrangement By Share Based Payment Award Option Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionExpirationsInPeriod	-157386	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0.49
CY2021	gthp	Outstanding End OutstandingEnd	1500000	shares
CY2021Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	0.49
CY2021	gthp	Weighted Average Remaining Contractual Life Outstanding WeightedAverageRemainingContractualLifeOutstanding	P8Y6M
CY2021	gthp	Agrregate Intrensic Value Outstanding AgrregateIntrensicValueOutstanding	135	usd
CY2021	gthp	Number Of Shares Exercisable NumberOfSharesExercisable	954273	shares
CY2021	gthp	Weighted Average Exercise Price Per Share Exercisable WeightedAverageExercisePricePerShareExercisable	0.49
CY2021	gthp	Weighted Average Remaining Contractual Life Exercisable WeightedAverageRemainingContractualLifeExercisable	P8Y6M
CY2021	gthp	Agrregate Intrensic Value Exercisable AgrregateIntrensicValueExercisable	86	usd
CY2022	gthp	Outstanding End OutstandingEnd	1500000	shares
CY2022Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	0.49
CY2022	gthp	Weighted Average Remaining Contractual Life Outstanding WeightedAverageRemainingContractualLifeOutstanding	P7Y6M
CY2022	gthp	Agrregate Intrensic Value Outstanding AgrregateIntrensicValueOutstanding	0	usd
CY2022	gthp	Number Of Shares Exercisable NumberOfSharesExercisable	1318091	shares
CY2022	gthp	Weighted Average Exercise Price Per Share Exercisable WeightedAverageExercisePricePerShareExercisable	0.49
CY2022	gthp	Weighted Average Remaining Contractual Life Exercisable WeightedAverageRemainingContractualLifeExercisable	P7Y6M
CY2022	gthp	Agrregate Intrensic Value Exercisable AgrregateIntrensicValueExercisable	0	usd
CY2022	gthp	Unrecognized Stock Based Compensation Expense UnrecognizedStockBasedCompensationExpense	87823	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.47
CY2022	gthp	Expected Term Years ExpectedTermYears	P10Y
CY2022	gthp	Fair Value Assumption Expected Volatility Rate FairValueAssumptionExpectedVolatilityRate	1.5312	pure
CY2022	gthp	Fair Value Assumption Risk Free Interest Rate FairValueAssumptionRiskFreeInterestRate	0.0098	pure
CY2022	gthp	Fair Value Assumption Expected Dividend Rate FairValueAssumptionExpectedDividendRate	0.0000	pure
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	303000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	372000	usd
CY2022Q4	gthp	Operating Lease Liability One OperatingLeaseLiabilityOne	325000	usd
CY2021Q4	gthp	Operating Lease Liability One OperatingLeaseLiabilityOne	392000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	112000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	115000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	118000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	50000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	395000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	70000	usd
CY2022Q4	gthp	Operating Lease Liabilities OperatingLeaseLiabilities	325000	usd
CY2022	gthp	Schedule Of Weighted Average Remaining Lease Term And Discount Rate ScheduleOfWeightedAverageRemainingLeaseTermAndDiscountRate	<table cellpadding="0" style="border-spacing:0;text-align:left;font:10pt times new roman;width:100%"><tbody><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="6" style="BORDER-BOTTOM: #000000 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>Year Ended December 31,</strong></p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px"><td><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>2022</strong></p></td><td style="PADDING-BOTTOM: 1px;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="BORDER-BOTTOM: 1px solid;width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;"><strong>2022</strong></p></td><td style="PADDING-BOTTOM: 1px;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Weighted average remaining lease term (years)</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">3.4</td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">4.4</td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Weighted average discount rate</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">11.4</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">11.4</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr></tbody></table>
CY2022	us-gaap	Finite Lived Intangible Asset Weighted Average Period Before Next Renewal Or Extension FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension	P3Y4M24D
CY2021	us-gaap	Finite Lived Intangible Asset Weighted Average Period Before Next Renewal Or Extension FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension	P4Y4M24D
CY2022	gthp	Weighted Average Discount Rateoperating Lease WeightedAverageDiscountRateoperatingLease	0.114	pure
CY2021	gthp	Weighted Average Discount Rateoperating Lease WeightedAverageDiscountRateoperatingLease	0.114	pure
CY2016Q2	gthp	Royalty Percent RoyaltyPercent	0.20	pure
CY2020Q1	gthp	Warrants Broken Into Four Tranches WarrantsBrokenIntoFourTranches	1250000	shares
CY2020Q1	us-gaap	Share Price SharePrice	0.25
CY2022	gthp	Schedule Of Fair Value Of The Warrants Using The Black Scholes Option Pricing Model ScheduleOfFairValueOfTheWarrantsUsingTheBlackScholesOptionPricingModel	<table cellpadding="0" style="border-spacing:0;text-align:left;font:10pt times new roman;margin-left:auto;margin-right:auto;width:80%"><tbody><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:bottom;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Expected term</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:right;">3.0 Years</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Volatility</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">108.65</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Risk-free interest rate</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">4.25</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Dividend yield</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">0.00</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr></tbody></table><table cellpadding="0" style="border-spacing:0;text-align:left;font:10pt times new roman;margin-left:auto;margin-right:auto;width:80%"><tbody><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:bottom;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Expected term</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="hdcell" colspan="2" style="width:9%;vertical-align:bottom;text-align:center;"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:right;">1.3 Years</p></td><td style="white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Volatility</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">164.63</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#cceeff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Risk-free interest rate</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">4.05</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr><tr style="height:15px;background-color:#ffffff"><td style="vertical-align:top;"><p style="font-size:10pt;font-family:times new roman;margin:0px">Dividend yield</p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td style="width:1%;white-space: nowrap;"><p style="font-size:10pt;font-family:times new roman;margin:0px"> </p></td><td class="ffcell" style="width:9%;vertical-align:bottom;text-align:right;">0.00</td><td style="width:1%;vertical-align:bottom;white-space: nowrap;">%</td></tr></tbody></table>
CY2022	gthp	Expected Term ExpectedTerm	P3Y
CY2022	gthp	Volatility Volatility	1.0865	pure
CY2022	gthp	Risk Free Interest Rate RiskFreeInterestRate	0.0425	pure
CY2022	gthp	Dividend Yield DividendYield	0.0000	pure
CY2021Q4	gthp	Financing Agreement Amount FinancingAgreementAmount	1000000	usd
CY2021	gthp	Expected Term ExpectedTerm	P1Y3M18D
CY2021	gthp	Volatility Volatility	1.6463	pure
CY2021	gthp	Risk Free Interest Rate RiskFreeInterestRate	0.0405	pure
CY2021	gthp	Dividend Yield DividendYield	0.0000	pure
CY2019Q3	gthp	Consideration Received ConsiderationReceived	885144	usd
CY2019Q3	gthp	Escrow Agent Rate Per Share EscrowAgentRatePerShare	1.90
CY2021Q4	us-gaap	Notes Payable NotesPayable	47615	usd
CY2022Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	619	usd
CY2022Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	58000	usd
CY2021Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	88000	usd
CY2021Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	39900	usd
CY2019Q4	us-gaap	Convertible Debt ConvertibleDebt	2400000	usd
CY2022Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.24	pure
CY2022	gthp	Convertible Debt Conversion Price Description ConvertibleDebtConversionPriceDescription	variable conversion price was 95% multiplied by the market price (the market price means the average of the five lowest trading prices during the period beginning on the issue date and ending on the maturity date
CY2019Q4	us-gaap	Share Price SharePrice	0.04
CY2019Q4	gthp	Variable Conversion Price VariableConversionPrice	0.15
CY2022	gthp	Loss On Extinguishment Of Debt LossOnExtinguishmentOfDebt	1228183	usd
CY2022Q3	gthp	Early Repayment Of Senior Debt Penalty EarlyRepaymentOfSeniorDebtPenalty	350000	usd
CY2022Q3	gthp	Default Premiums DefaultPremiums	281256	usd
CY2022Q3	gthp	Interest Payable InterestPayable	91555	usd
CY2022Q3	gthp	Amount Reduce After Exchange AmountReduceAfterExchange	710911	usd
CY2022Q3	gthp	Warrant Exchange WarrantExchange	8775000	shares
CY2022Q3	gthp	Debt Instrument Default Penalty Forgiven DebtInstrumentDefaultPenaltyForgiven	225444	usd
CY2022	us-gaap	Repayments Of Debt RepaymentsOfDebt	221467	usd
CY2022	us-gaap	Debt Instrument Periodic Payment Principal DebtInstrumentPeriodicPaymentPrincipal	161184	usd
CY2022	gthp	Interest Payable InterestPayable	60283	usd
CY2022Q3	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	125000	usd
CY2022Q3	gthp	Outstanding Principal Amount OutstandingPrincipalAmount	101489	usd
CY2022Q3	gthp	Interest Payable InterestPayable	23512	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	0	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-14000	usd
CY2022Q4	gthp	Convertible Notes Payable Short Term ConvertibleNotesPayableShortTerm	326000	usd
CY2021Q4	gthp	Convertible Notes Payable Short Term ConvertibleNotesPayableShortTerm	897000	usd
CY2022Q4	gthp	Non Convertible Penalty NonConvertiblePenalty	230482	usd
CY2021Q4	gthp	Convertible Note Payable Defaultd Debt ConvertibleNotePayableDefaultdDebt	161000	usd
CY2021Q4	gthp	Non Convertible Penalty NonConvertiblePenalty	350000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	259000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	288000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	415000	usd
CY2022Q4	gthp	Senior Unsecured Convertible Debentures SeniorUnsecuredConvertibleDebentures	1130000	usd
CY2021Q4	gthp	Senior Unsecured Convertible Debentures SeniorUnsecuredConvertibleDebentures	1130000	usd
CY2022Q4	gthp	Debt Issuance Costs Amortized DebtIssuanceCostsAmortized	-40000	usd
CY2021Q4	gthp	Debt Issuance Costs Amortized DebtIssuanceCostsAmortized	-69000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	140000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	241000	usd
CY2022Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	950000	usd
CY2021Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	820000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-4972000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2431000	usd
CY2022	us-gaap	Weighted Average Number Basic Shares Outstanding Adjustment Pro Forma WeightedAverageNumberBasicSharesOutstandingAdjustmentProForma	32505	shares
CY2021	us-gaap	Weighted Average Number Basic Shares Outstanding Adjustment Pro Forma WeightedAverageNumberBasicSharesOutstandingAdjustmentProForma	13377	shares
CY2022	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	-0.15
CY2021	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	-0.18
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	32505	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	13377	shares
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.15
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.18
CY2022	gthp	Decrease Net Income Loss DecreaseNetIncomeLoss	191051	usd
CY2022	gthp	Troubled Debt Restructuring Description TroubledDebtRestructuringDescription	the troubled debt restructurings in total decreased net loss by $191,051, or $0.01 per share
CY2022	us-gaap	Debt Instrument Decrease Forgiveness DebtInstrumentDecreaseForgiveness	191051	usd
CY2021	gthp	Troubled Debt Restructuring Description TroubledDebtRestructuringDescription	the total troubled debt restructuring decreased net loss by $85,000, or $0.01 per share
CY2021	gthp	Decrease Net Income Loss DecreaseNetIncomeLoss	85000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other Loss Carryforwards DeferredTaxAssetsOtherLossCarryforwards	52400000	usd
CY2017Q4	us-gaap	Deferred Tax Assets Other Loss Carryforwards DeferredTaxAssetsOtherLossCarryforwards	13200000	usd
CY2022	gthp	Taxable Income Offset TaxableIncomeOffset	0.80	pure
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	0	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	439000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	16993000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	17064000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18186000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	17064000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18186000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	usd
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.25	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.25	pure
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0	pure
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0	pure
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-617000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1223000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	617000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1223000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	usd

Files In Submission

Name	View Source	Status
gthp-20221231_pre.xml	Edgar Link	unprocessable
0001477932-23-001899-index-headers.html	Edgar Link	pending
0001477932-23-001899-index.html	Edgar Link	pending
0001477932-23-001899.txt	Edgar Link	pending
0001477932-23-001899-xbrl.zip	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
gthp-20221231.xsd	Edgar Link	pending
gthp_10k.htm	Edgar Link	pending
gthp_10kimg11.jpg	Edgar Link	pending
gthp_ex231.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
gthp-20221231_cal.xml	Edgar Link	unprocessable
gthp-20221231_def.xml	Edgar Link	unprocessable
gthp-20221231_lab.xml	Edgar Link	unprocessable
gthp_10k_htm.xml	Edgar Link	completed
gthp_ex31.htm	Edgar Link	pending
gthp_ex32.htm	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$GTHP
GUIDED THERAPEUTICS INC Stock $gthp

2023 Q1 Form 10-K Financial Statement

#000147793223001899 Filed on March 30, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GTHP GUIDED THERAPEUTICS INC Stock $gthp

2023 Q1 Form 10-K Financial Statement

#000147793223001899 Filed on March 30, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GTHP
GUIDED THERAPEUTICS INC Stock $gthp