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Note A - The Company and Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Feb. 03, 2015	Dec. 31, 2012
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items]
Retained Earnings (Accumulated Deficit)	$ (56,754,144)us-gaap_RetainedEarningsAccumulatedDeficit	$ (54,870,572)us-gaap_RetainedEarningsAccumulatedDeficit
Cash and Cash Equivalents, at Carrying Value	843,632us-gaap_CashAndCashEquivalentsAtCarryingValue	2,023,349us-gaap_CashAndCashEquivalentsAtCarryingValue		83,989us-gaap_CashAndCashEquivalentsAtCarryingValue
Operational Costs Per Month	475,000bkyi_OperationalCosts
Advertising Expense	252,000us-gaap_AdvertisingExpense	178,000us-gaap_AdvertisingExpense
Allocated Share-based Compensation Expense	$ 207,258us-gaap_AllocatedShareBasedCompensationExpense	$ 81,642us-gaap_AllocatedShareBasedCompensationExpense
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	1,835,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	1,175,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Subsequent Event [Member] | Reverse Stock Split [Member]
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items]
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Minimum [Member]
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Maximum [Member]
Note A - The Company and Summary of Significant Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years

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