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Note L - Segment Information (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Note L - Segment Information (Details) [Line Items]
Number of Reportable Segments	1
Entity-Wide Revenue, Major Customer, Percentage	10.00%
North American [Member]
Note L - Segment Information (Details) [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	93.00%	54.00%
Non-North American [Member]
Note L - Segment Information (Details) [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		46.00%
Africa [Member]
Note L - Segment Information (Details) [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		43.00%

X

- Details

Name:	bkyi_NoteLSegmentInformationDetailsLineItems
Namespace Prefix:	bkyi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration