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Note I - Deferred Revenue (Details) (Maintenance Contracts [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
Maintenance Contracts [Member]
Note I - Deferred Revenue (Details) [Line Items]
Deferred Revenue, Current	$ 429,000us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = bkyi_MaintenanceContractsMember	$ 528,000us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = bkyi_MaintenanceContractsMember

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- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1)

-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

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