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Title and Position [Domain] Deposits and other assets Schedule of Inventory, Current [Table Text Block] us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) Stock based directors’ fees The costs and payments related to stock-based fees to directors and consultants. Accounts payable Intangible assets, net us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Bio-Key International [Member] Relating to Bio-Key International. Document Fiscal Period Focus bkyi_DebtInstrumentMandatoryPrepaymentPercentage Debt Instrument, Mandatory Prepayment, Percentage Represents the mandatory prepayment percentage. us-gaap_ProceedsFromIssuanceOfWarrants Proceeds from Issuance of Warrants Customer [Domain] Commitments Disclosure [Text Block] Document Fiscal Year Focus us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 Stockholders' Equity Note, Stock Split, Conversion Ratio Investment, Name [Domain] bkyi_DebtInstrumentIncreaseDecreasePercentage Debt Instrument, Increase (Decrease), Percentage Represents the percentage of increase (decrease) in the debt instrument pursuant to the loan agreement. us-gaap_ComprehensiveIncomeNetOfTax Comprehensive loss Amendment Flag bkyi_InvestmentOwnedPercentageOfSharesOutstanding Investment Owned, Percentage of Shares Outstanding Represents the percentage of outstanding shares of investment owned. bkyi_DebtInstrumentExitFeePercentage Debt Instrument, Exit Fee Percentage Contractual exit fee rate for funds borrowed, under the debt agreement. Common Stock [Member] bkyi_DebtInstrumentRedemptionAmount Debt Instrument, Redemption Amount The principal amount of debt at which debt can be redeemed by the issuer. Promissory Note 2 [Member] The second promissory note. Concentration Risk [Table] Promissory Note 1 [Member] The first promissory note. Subsequent Events [Text Block] Concentration Risk Type [Axis] Accrued liabilities Document Period End Date Concentration Risk Disclosure [Text Block] Exchange Agreement Conversions into Common Stock [Member] Represents exchange agreement conversions into common stock. Legal Entity [Axis] Total lease cost us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less: imputed interest Entity File Number Government Loan [Member] Represents information related to government loan. Operating lease liabilities, net of current portion Operating lease liabilities, non-current portion Entity Tax Identification Number Noncash investing and financing activities Total us-gaap_OperatingLeaseLiability Total operating lease liabilities Operating lease liabilities, current portion Operating lease liabilities, current portion Senior Secured Promissory Note [Member] Represents the senior secured promissory note. Disaggregation of Revenue [Table Text Block] bkyi_IncreaseDecreaseInCapitalizedContractCosts Capitalized contract costs The amount of increase (decrease) in capitalized contract costs. Disaggregation of Revenue [Table] Entity [Domain] Entity Central Index Key Hardware [Member] Represents information pertaining to hardware. Entity Registrant Name Entity Current Reporting Status Accounts Receivable [Member] Entity Incorporation, State or Country Code Debt, current Current Fiscal Year End Date Concentration Risk Type [Domain] Research, development and engineering Entity Filer Category Entity Shell Company Entity Emerging Growth Company Entity Small Business us-gaap_OperatingIncomeLoss Operating loss bkyi_DebtInstrumentReductionInOutstandingBalanceAtTheEndOfEachMonth Debt Instrument, Reduction in Outstanding Balance at The End Of Each Month The cash outflow from the repayment of the outstanding balance pursuant the agreement. Outstanding Warrants [Member] Related to outstanding warrants. Boumarang, Inc. [Member] Related to Boumarang, Inc. us-gaap_PaymentsOfFinancingCosts Payments of Financing Costs us-gaap_LongTermDebt Long-Term Debt us-gaap_ContractWithCustomerLiabilityRevenueRecognized Contract with Customer, Liability, Revenue Recognized Revenues Loss Contingencies [Table] Entity Address, State or Province Statement of Stockholders' Equity [Abstract] Inventory, Current [Table] Entity Address, City or Town SPAIN Lessee, Operating Lease, Costs, Assets and Liabilities [Table Text Block] The tabular disclosure of costs, assets, and liabilities subject to operating lease by lessee. us-gaap_InterestExpenseNonoperating Interest expense Accumulated deficit Entity Address, Address Line One Class of Warrant or Right [Axis] Hardware Reserve [Member] Relating to hardware reserve. Class of Warrant or Right [Domain] Statement of Cash Flows [Abstract] City Area Code Capitalized contract costs, net Other comprehensive income (loss) – foreign currency translation adjustment Local Phone Number Entity Address, Postal Zip Code Revenue from Contract with Customer [Text Block] Long-Term Debt, Type [Domain] STOCKHOLDERS’ EQUITY Title of 12(b) Security Equity Components [Axis] Security Exchange Name Trading Symbol Operating lease liabilities Class of Stock [Axis] Equity Component [Domain] us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) Warrant Inducement Agreement [Member] Represents the warrant inducement agreement. Amortization of capitalized contract costs Equity [Text Block] AOCI Attributable to Parent [Member] Entity Common Stock, Shares Outstanding Additional Paid-in Capital [Member] Retained Earnings [Member] Earnings Per Share [Text Block] us-gaap_CostOfGoodsAndServicesSold Cost of Goods and Services Sold Asset Acquisition [Domain] Director [Member] Foreign Currency Transactions and Translations Policy [Policy Text Block] Asset Acquisition [Axis] Reserve for inventory us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput Investment Company, Investment Owned, Measurement Input Equipment and leasehold improvements, net us-gaap_ProceedsFromDebtNetOfIssuanceCosts Proceeds from Debt, Net of Issuance Costs us-gaap_AssetAcquisitionConsiderationTransferred Asset Acquisition, Consideration Transferred Subsequent Event Type [Domain] Bad debts Subsequent Event [Table] Subsequent Event Type [Axis] Weighted average common shares outstanding: bkyi_BeneficialOwnershipLimitationPercentageOfCommonStockOutstanding Beneficial Ownership Limitation, Percentage of Common Stock Outstanding The maximum amount of common stock, expressed as a percentage of total common stock outstanding, an investor is allowed to own. New Warrants [Member] Represents the New Warrants. Proceeds for exercise of warrants Proceeds from Warrant Exercises Costs and other expenses Common stock, par value (in dollars per share) Investment, Name [Axis] us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue Share-based compensation Basis of Accounting, Policy [Policy Text Block] us-gaap_Assets TOTAL ASSETS Deferred tax liability Cash and cash equivalents Geographical [Domain] Geographical [Axis] Fair Value Disclosures [Text Block] Substantial Doubt about Going Concern [Text Block] Share-Based Payment Arrangement, Option [Member] us-gaap_CommonStockCapitalSharesReservedForFutureIssuance Common Stock, Capital Shares Reserved for Future Issuance (in shares) Interest payable on note Operating leases right-of-use assets Represents the amortization expense or reversal for a right of use asset under an operating lease. Employee Stock Purchase Plan [Member] Information regarding employee stock purchase plan. us-gaap_LiabilitiesCurrent Total current liabilities Investment [Text Block] Deferred revenue, long term us-gaap_ContractWithCustomerLiability Contract with Customer, Liability us-gaap_InvestmentOwnedBalanceShares Investment Owned, Balance, Shares (in shares) EMESA [Member] Related to EMESA. Customer [Axis] Deferred revenue, current us-gaap_AccountsReceivableNetCurrent Accounts receivable, net Accounts receivable, net of allowances for credit losses Investment Holdings [Table] Customer Concentration Risk [Member] Accounts and Financing Receivables [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Wavedrone Platform from Shore House IVF [Member] Relating to Wavedrone platform from Shore House IVF. License [Member] Interest income Interest Inventory Disclosure [Text Block] Revenue Benchmark [Member] Long-Term Debt [Text Block] Accumulated other comprehensive income Inventory Total inventory Service [Member] us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Loss before provision for income taxes (tax benefits) Existing Warrants [Member] Represents the existing warrants. 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