Note 13 - Earnings per Share - Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income	$ 1,840	$ 2,839
Earnings allocated to unvested shares	15	36
Net income available to common shareholders, basic and diluted	$ 1,825	$ 2,803
Weighted average common shares including unvested common shares outstanding (in shares)	7,481,884	7,469,912
Weighted average shares outstanding (in shares)	7,420,521	7,375,003
Basic income per common share (in dollars per share)	$ 0.25	$ 0.38
Add: Dilutive effects of assumed exercises of common stock warrants (in shares)
Weighted average common shares and potential common shares (in shares)	7,420,521	7,375,003
Diluted income per common share (in dollars per share)	$ 0.25	$ 0.38
Unvested Shares [Member]
Weighted average shares outstanding (in shares)	61,363	94,909