Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	19,040
Balance at Dec. 31, 2017	$ 78,584	$ 9,246	$ (36,432)	$ (20,254)	$ 31,144
Share-based compensation (in shares)	71
Share-based compensation	$ 845	120			965
Vested restricted stock issued (in shares)	15
Vested restricted stock issued	$ 120	(120)
Shares cancelled to pay tax liability (in shares)	(35)
Shares cancelled to pay tax liability	$ (411)				(411)
Other comprehensive income - pension				185	185
Net loss			(964)		(964)
Balance (in shares) at Mar. 31, 2018	19,091
Balance at Mar. 31, 2018	$ 79,138	9,246	(37,396)	(20,069)	30,919
Net income			(964)		(964)
Balance (in shares) at Dec. 31, 2018	19,125
Balance at Dec. 31, 2018	$ 79,411	9,246	(35,934)	(21,804)	30,919
Share-based compensation (in shares)	52
Share-based compensation	$ 889	208			1,097
Vested restricted stock issued (in shares)	16
Vested restricted stock issued	$ 208	(208)
Stock option exercised (Note 3) (in shares)	25
Stock option exercised (Note 3)	$ 62	68			130
Shares cancelled to pay tax liability (in shares)	(38)
Shares cancelled to pay tax liability	$ (400)				(400)
Other comprehensive income - pension				211	211
Net loss			(1,095)		(1,095)
Balance (in shares) at Mar. 31, 2019	19,180
Balance at Mar. 31, 2019	$ 80,170	9,314	(37,029)	(21,593)	30,862
Net income			$ (1,095)		$ (1,095)