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Note 4 - Factoring (Details Textual)	1 Months Ended
	Dec. 31, 2011
Foreign [Member]
Percentage Of Accounts Receivable Remitted By Factor	35.00%
UNITED STATES
Percentage Of Accounts Receivable Remitted By Factor	75.00%
Minimum [Member]
Factoring Fees Percent	2.75%
Maximum [Member]
Factoring Fees Percent	21.00%
Factoring Arrangement Term	2 years

X

- Definition

The term of the factoring arrangement.

+ References

No definition available.

+ Details

Name:	bkyi_FactoringArrangementTerm
Namespace Prefix:	bkyi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Factoring fees percent.

+ References

No definition available.

+ Details

Name:	bkyi_FactoringFeesPercent
Namespace Prefix:	bkyi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of accounts receivable remitted by factor.

+ References

No definition available.

+ Details

Name:	bkyi_PercentageOfAccountsReceivableRemittedByFactor
Namespace Prefix:	bkyi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_StatementGeographicalAxis=bkyi_ForeignMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: