Note 13 - Employee Benefit Plans - Summary of Award Activity for Performance Share Units (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Nonvested, shares (in shares)	688,167
Nonvested, weighted average grant-date fair value (in dollars per share)	$ 13.94
Granted, shares (in shares)	423,896
Weighted-average, grant-date fair value of awards granted (in dollars per share)	$ 8.96	$ 11.86	$ 12.25
Forfeited, shares (in shares)	(131,797)
Forfeited, weighted average grant-date fair value (in dollars per share)	$ 18.31
Nonvested, shares (in shares)	980,266	688,167
Nonvested, weighted average grant-date fair value (in dollars per share)	$ 10.64	$ 13.94