Note 8 - Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019		Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Net (loss) income attributable to Common shareholders	$ (1,655)		$ 1,036	$ (1,332)		$ 2,101
Weighted average shares outstanding (in shares)	3,921,878		3,903,858	3,919,608		3,902,195
Basic (loss) earnings per share (in dollars per share)	$ (0.42)		$ 0.27	$ (0.34)		$ 0.54
Net (loss) income attributable to Common shareholders	$ (1,655)		$ 1,036	$ (1,332)		$ 2,101
Effect of potentially dilutive restricted common shares (in shares)			13,603		[1]	17,943
Weighted average diluted shares outstanding (in shares)	3,921,878	[2]	3,917,461	3,919,608		3,920,138
Diluted (loss) earnings per share (in dollars per share)	$ (0.42)		$ 0.26	$ (0.34)		$ 0.54

[1] The weighted average diluted shares outstanding does not include 3,005 anti-dilutive restricted common shares for the six months ended June 30, 2019.

[2] The weighted average diluted shares outstanding does not include 5,572 anti-dilutive restricted common shares for the three months ended June 30, 2019.