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Note B - Factoring (Details Textual) | 1 Months Ended
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Dec. 31, 2011
Geographic Distribution, Foreign [Member] |
Percentage Of Accounts Receivable Remitted By Factor | 35.00%
Geographic Distribution, Domestic [Member] |
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_GeographicDistributionAxis=us-gaap_GeographicDistributionForeignMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionDomesticMember
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: |