Note 14 - Equity Compensation - Activity Under the Omnibus Equity Plan (Details) - Omnibus Equity Plan [Member]	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Nonvested, shares (in shares) | shares	26,025
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 21.78
Granted, shares (in shares) | shares	47,567
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 15.82
Vested, shares (in shares) | shares	(22,136)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 21.74
Forfeited, shares (in shares) | shares	0
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Nonvested, shares (in shares) | shares	51,456
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 16.29