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Condensed Consolidated Statements of Cash Flows (Unaudited) (Parentheticals)	3 Months Ended
	Mar. 31, 2022 USD ($)
Receipt of cash from note receivable	$ 3,000
Swivel Secure Europe [Member]
Receipt of cash from note receivable	$ 729,905

X

- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_CashAcquiredFromAcquisition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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