Note 14 - Employee Benefits - ESOP Share Allocation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Shares held by participants beginning of the year (in shares)	353,677	359,843
Shares allocated to participants (in shares)	24,318	24,318
Shares purchased with dividends received on allocated shares (in shares)	3,540	0
Shares distributed to participants (in shares)	(20,466)	(30,484)
Shares held by participants end of year (in shares)	361,069	353,677
Unreleased shares beginning of the year (in shares)	158,100	182,418
Shares released during year (in shares)	(24,318)	(24,318)
Unreleased shares end of year (in shares)	133,782	158,100
Total ESOP shares end of year (in shares)	494,851	511,777
Fair value of unreleased shares at December 31	$ 2,854,908	$ 3,900,327