Note 16 - Employee Benefit Plans - Performance Stock Units (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance of shares non-vested (in shares)	53,075	0	47,322
Balance of shares non-vested, weighted average grant-date price (in dollars per share)	$ 15.40	$ 0	$ 20.48
Granted (in shares)	0	53,075	0
Granted (in dollars per share)	$ 0	$ 15.40	$ 0
Vested (in shares)	0	0	(30,919)
Vested, weighted average grant-date price (in dollars per share)	$ 0	$ 0	$ 20.48
Forfeited (in shares)	(9,927)	0	(16,403)
Forfeited, weighted average grant-date price (in dollars per share)	$ 15.62	$ 0	$ 20.48
Balance of shares non-vested (in shares)	43,148	53,075	0
Balance of shares non-vested, weighted average grant-date price (in dollars per share)	$ 15.34	$ 15.40	$ 0