Shareholders' Equity - Calculation of earning per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Shareholders' Equity
Net Income	$ 965	$ 1,898	$ 714	$ 98	$ 2,863	$ 812
Weighted average common shares outstanding (basic) (in shares)	2,364		2,324		2,364	2,322
Unvested restricted stock (in shares)	25		60		25	60
Weighted average common shares outstanding (diluted) (in shares)	2,389		2,384		2,389	2,382
Basic
Net Income per share (in dollars per share)	$ 0.41		$ 0.31		$ 1.21	$ 0.35
Diluted
Net income per share (in dollars per share)	$ 0.40		$ 0.30		$ 1.20	$ 0.34