Stockholders' Equity (Deficit) - Summary of common shareholders' equity - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Common Stock	Capital in excess of par value	Retained earnings	ESOT	Treasury stock	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2014	$ 523	$ 14,068	$ 9,176	$ (964)	$ (1,909)	$ (14)	$ 20,880
Balance (shares) at Dec. 31, 2014	2,614,506						2,614,506
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			$ 3,392				$ 3,392
Purchase of treasury shares					$ (114)		(114)
Dividend payable			$ (375)				(375)
Stock based compensation		$ 23			$ 157		180
Balance at Jun. 30, 2015	$ 523	$ 14,091	$ 12,193	$ (964)	$ (1,866)	$ (14)	$ 23,963
Balance (shares) at Jun. 30, 2015	2,614,506						2,614,506