Note 16 - Stock Based Compensation - Restricted Stock Award Activity (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance, at Beginning of Period (in shares)	53,756	39,971	31,002
Balance, at Beginning of Period, weighted average grant date fair value (in dollars per share)	$ 24.49	$ 22.64	$ 19.58
Granted (in shares)	111,687	60,635	39,994
Granted, weighted average grant date fair value (in dollars per share)	$ 20.73	$ 24.79	$ 23.96
Forfeited (in shares)	(989)	0	(530)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 24.11	$ 0	$ 19.47
Earned and Issued (in shares)	(70,209)	(46,850)	(30,495)
Earned and Issued, weighted average grant date fair value (in dollars per share)	$ 22.43	$ 23.09	$ 21.31
Balance, at End of Period (in shares)	94,245	53,756	39,971
Balance, at End of Period, weighted average grant date fair value (in dollars per share)	$ 21.60	$ 24.49	$ 22.64