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Note M - Stock Options (Details) (USD $)	12 Months Ended		8 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Aug. 31, 2009	Oct. 12, 2004
Note M - Stock Options (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 164 days	4 years 175 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares)	1,726,963us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 0.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	$ 0.30us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 14,650us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	$ 31,643us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	143,382us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	42,058us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 438,571us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 339 days
Non-statutory Stock [Member] | 1999 Stock Option Plan [Member]
Note M - Stock Options (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			10 years
In the Money Options [Member]
Note M - Stock Options (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares)	550,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = bkyi_InTheMoneyOptionsMember
Closing Stock Price [Member]
Note M - Stock Options (Details) [Line Items]
Share Price (in Dollars per share)	$ 0.22us-gaap_SharePrice / us-gaap_StatementScenarioAxis = bkyi_ClosingStockPriceMember
Minimum [Member] | 1999 Stock Option Plan [Member]
Note M - Stock Options (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent			85.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent / us-gaap_PlanNameAxis = bkyi_The1999StockOptionPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Minimum [Member] | 2004 Stock Option Plan [Member]
Note M - Stock Options (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent				85.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent / us-gaap_PlanNameAxis = bkyi_The2004StockOptionPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember
1999 Stock Option Plan [Member]
Note M - Stock Options (Details) [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance (in Shares)			1,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_PlanNameAxis = bkyi_The1999StockOptionPlanMember
2004 Stock Option Plan [Member]
Note M - Stock Options (Details) [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance (in Shares)				2,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_PlanNameAxis = bkyi_The2004StockOptionPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				10 years

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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