Shareholders' Equity - Calculation of earning per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Shareholders' Equity
Net Income	$ 1,898	$ 98
Weighted average common shares outstanding (basic) (in shares)	2,363	2,328
Unvested restricted stock (in shares)	27	53
Weighted average common shares outstanding (diluted) (in shares)	2,390	2,381
Basic
Net Income per share (in dollars per share)	$ 0.80	$ 0.04
Diluted
Net income per share (in dollars per share)	$ 0.79	$ 0.04