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	268			1,113
Vested restricted stock issued (in shares)	31
Vested restricted stock issued	$ 268	(268)
Shares cancelled to pay tax liability (in shares)	(39)
Shares cancelled to pay tax liability	$ (467)				(467)
Other comprehensive income - pension				370	370
Net loss			(1,534)		(1,534)
Balance (in shares) at Jun. 30, 2018	19,103
Balance at Jun. 30, 2018	$ 79,230	9,246	(37,966)	(19,884)	30,626
Balance (in shares) at Dec. 31, 2017	19,040
Balance at Dec. 31, 2017	$ 78,584	9,246	(36,432)	(20,254)	31,144
Other comprehensive income - pension					555
Net loss					(3,161)
Balance (in shares) at Sep. 30, 2018	19,114
Balance at Sep. 30, 2018	$ 79,299	9,246	(39,593)	(19,699)	29,253
Balance (in shares) at Jun. 30, 2018	19,103
Balance at Jun. 30, 2018	$ 79,230	9,246	(37,966)	(19,884)	30,626
Share-based compensation		134			134
Vested restricted stock issued (in shares)	17
Vested restricted stock issued	$ 134	(134)
Shares cancelled to pay tax liability (in shares)	(6)
Shares cancelled to pay tax liability	$ (65)				(65)
Other comprehensive income - pension				185	185
Net loss			(1,627)		(1,627)
Balance (in shares) at Sep. 30, 2018	19,114
Balance at Sep. 30, 2018	$ 79,299	9,246	(39,593)	(19,699)	29,253
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	$ 951	329			1,280
Vested restricted stock issued (in shares)	33
Vested restricted stock issued	$ 329	(329)
Stock option exercised (Note 3) (in shares)	25
Stock option exercised (Note 3)	$ 62	68			130
Shares cancelled to pay tax liability (in shares)	(43)
Shares cancelled to pay tax liability	$ (456)				(456)
Other comprehensive income - pension				423	423
Net loss			(1,275)		(1,275)
Balance (in shares) at Jun. 30, 2019	19,192
Balance (in shares) at Dec. 31, 2018	19,125
Balance at Dec. 31, 2018	$ 79,411	9,246	(35,934)	(21,804)	30,919
Other comprehensive income - pension					634
Net loss					(1,284)
Balance (in shares) at Sep. 30, 2019	19,202
Balance at Sep. 30, 2019	$ 80,414	9,314	(37,218)	(21,170)	31,340
Balance (in shares) at Jun. 30, 2019	19,192
Share-based compensation		182			182
Vested restricted stock issued (in shares)	16
Vested restricted stock issued	$ 182	(182)
Shares cancelled to pay tax liability (in shares)	(6)
Shares cancelled to pay tax liability	$ (65)				(65)
Other comprehensive income - pension				211	211
Net loss			(9)		(9)
Balance (in shares) at Sep. 30, 2019	19,202
Balance at Sep. 30, 2019	$ 80,414	$ 9,314	$ (37,218)	$ (21,170)	$ 31,340