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Note 13 - Major Customers and Accounts Receivable (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenue Benchmark [Member] | One Customer [Member]
Concentration Risk, Number of Major Customers	1	1
Concentration Risk, Percentage	59.00%	19.00%
Revenue Benchmark [Member] | Two Customers [Member]
Concentration Risk, Number of Major Customers	2	2
Concentration Risk, Percentage	70.00%	56.00%
Accounts Receivable [Member] | One Customer [Member]
Concentration Risk, Number of Major Customers			1
Concentration Risk, Percentage			35.00%
Accounts Receivable [Member] | Three Customers [Member]
Concentration Risk, Number of Major Customers	3
Concentration Risk, Percentage	77.00%

X

- Definition

Represents the number of external customers that accounts for 10 percent or more of an entity's revenues or accounts receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	bkyi_
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Balance Type:	na
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X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-21

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-20

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

+ Details

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- Details

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- Details

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X

- Details

Name:	srt_MajorCustomersAxis=bkyi_OneCustomerMember
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- Details

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- Details

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- Details

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