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Note A - The Company and Summary of Significant Accounting Policies (Details) - Estimated Useful Lives For Depreciation and Amortization | 12 Months Ended
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Dec. 31, 2012
Equipment [Member] | Minimum [Member] |
Equipment and leasehold improvements |
Property, Plant, and Equipment Estimated Useful life | 3 years
Equipment [Member] | Maximum [Member] |
Equipment and leasehold improvements |
Property, Plant, and Equipment Estimated Useful life | 5 years
Furniture and Fixtures [Member] | Minimum [Member] |
Equipment and leasehold improvements |
Property, Plant, and Equipment Estimated Useful life | 3 years
Furniture and Fixtures [Member] | Maximum [Member] |
Equipment and leasehold improvements |
Property, Plant, and Equipment Estimated Useful life | 5 years
Computer Software, Intangible Asset [Member] |
Equipment and leasehold improvements |
Property, Plant, and Equipment Estimated Useful life | 3 years
Minimum [Member] |
Equipment and leasehold improvements |
Leasehold improvements | life or lease term

X
- Details
Name: | bkyi_EquipmentAndLeaseholdImprovementsAbstract
Namespace Prefix: | bkyi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of estimated useful life of leasehold improvement. + References No definition available. + Details
Name: | bkyi_LeaseholdImprovementsEstimatedUsefulLife
Namespace Prefix: | bkyi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration