Note 8 - Supplemental Disclosure for Earnings Per Share - Supplemental Disclosure for Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income attributable to First Capital, Inc.	$ 2,828	$ 2,726	$ 5,780	$ 6,542
Weighted average common shares outstanding (in shares)	3,345,278	3,344,063	3,345,169	3,348,817
Basic (in dollars per share)	$ 0.85	$ 0.82	$ 1.73	$ 1.95
Net income attributable to First Capital, Inc.	$ 2,828	$ 2,726	$ 5,780	$ 6,542
Add: Dilutive effect of restricted stock (in shares)	123	0	0	0
Weighted average common shares outstanding, as adjusted (in shares)	3,345,401	3,344,063	3,345,169	3,348,817
Diluted (in dollars per share)	$ 0.85	$ 0.82	$ 1.73	$ 1.95