Shareholders' Equity - Calculation of earning per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Shareholders' Equity
Net (Loss) Income	$ (1,782)	$ 965	$ 1,898	$ 1,132	$ 714	$ 98	$ 1,081	$ 1,944
Weighted average common shares outstanding (basic) (in shares)	2,363			2,327			2,358	2,325
Unvested restricted stock (in shares)	34			58			34	58
Weighted average common shares outstanding (diluted) (in shares)	2,397			2,385			2,392	2,383
Basic
Net (loss) income per share	$ (0.75)			$ 0.49			$ 0.46	$ 0.84
Diluted
Net (loss) income per share	$ (0.75)			$ 0.47			$ 0.45	$ 0.82