Note 2 - Earnings Per Share - Weighted Average Shares Used in Basic and Dilutive Earnings Per Share Computations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Income Attributable to Quaint Oak Bancorp, Inc.	$ 563,000	$ 2,248,000
Weighted average shares outstanding – basic (in shares)	2,182,597	2,013,638
Effect of dilutive common stock equivalents (in shares)	89,932	123,484
Adjusted weighted average shares outstanding – diluted (in shares)	2,272,530	2,137,122
Basic earnings per share (in dollars per share)	$ 0.26	$ 1.12
Diluted earnings per share (in dollars per share)	$ 0.25	$ 1.05