Note 14 - Equity Incentive Plan - Performance Stock Units (Details) - Performance Shares [Member]	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Outstanding, shares (in shares) | shares	178,297
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 35.93
Forfeited and cancelled, shares (in shares) | shares	(20,000)
Forfeited and cancelled, weighted average grant date fair value (in dollars per share) | $ / shares	$ 37.44
Outstanding, shares (in shares) | shares	158,297
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 37.44