Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Aug. 17, 2023
Document Information [Line Items]
Entity Central Index Key	0001019034
Entity Registrant Name	BIO KEY INTERNATIONAL INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2023
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	1-13463
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	41-1741861
Entity Address, Address Line One	3349 HIGHWAY 138, BUILDING A, SUITE E
Entity Address, City or Town	WALL
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07719
City Area Code	732
Local Phone Number	359-1100
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	BKYI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		9,255,256