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Note 4 - PistolStar Inc. Acquisition - Assets Acquired and Liabilities Assumed (Details) (Parentheticals)	Jun. 30, 2020
PistolStar [Member] | Promissory Note [Member]
Debt Instrument, Interest Rate	4.00%

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=bkyi_PistolstarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=bkyi_PromissoryNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: