Note 25 - Supplemental Disclosure for Earnings Per Share - Supplemental Disclosure for Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Net income attributable to First Capital, Inc.	$ 1,741	$ 1,758	$ 1,783	$ 1,582	$ 1,106	$ 1,398	$ 1,228	$ 1,466	$ 6,864	$ 5,198
Weighted average common shares outstanding (in shares)									3,340,566	2,783,508
Basic (in dollars per share)	$ 0.52	$ 0.53	$ 0.53	$ 0.47	$ 0.38	$ 0.51	$ 0.45	$ 0.53	$ 2.05	$ 1.87
Add: Dilutive effect of restricted stock (in shares)									2,850	404
Weighted average common shares outstanding, as adjusted (in shares)									3,343,416	2,783,912
Net income per common share attributable to First Capital, Inc., diluted (in dollars per share)									$ 2.05	$ 1.87