Condensed Consolidated Statements of Changes in 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, 2019	19,238
Balance at Dec. 31, 2019	$ 80,606	$ 9,184	$ (46,300)	$ (20,798)	$ 22,692
Share-based compensation (in shares)	68
Share-based compensation	$ 865	349			1,214
Vested restricted stock issued (in shares)	31
Vested restricted stock issued	$ 349	(349)			0
Shares cancelled to pay tax liability (in shares)	(46)
Shares cancelled to pay tax liability	$ (569)				(569)
Other comprehensive income - pension				412	412
Net income (loss)			(1,231)		(1,231)
Balance (in shares) at Jun. 30, 2020	19,291
Balance at Jun. 30, 2020	$ 81,251	9,184	(47,531)	(20,386)	22,518
Balance (in shares) at Dec. 31, 2019	19,238
Balance at Dec. 31, 2019	$ 80,606	9,184	(46,300)	(20,798)	22,692
Other comprehensive income - pension					617
Net income (loss)					(1,864)
Balance (in shares) at Sep. 30, 2020	19,301
Balance at Sep. 30, 2020	$ 81,369	9,184	(48,164)	(20,180)	22,209
Balance (in shares) at Jun. 30, 2020	19,291
Balance at Jun. 30, 2020	$ 81,251	9,184	(47,531)	(20,386)	22,518
Share-based compensation (in shares)
Share-based compensation		163			163
Vested restricted stock issued (in shares)	14
Vested restricted stock issued	$ 163	(163)			0
Shares cancelled to pay tax liability (in shares)	(4)
Shares cancelled to pay tax liability	$ (45)				(45)
Other comprehensive income - pension				206	206
Net income (loss)			(633)		(633)
Balance (in shares) at Sep. 30, 2020	19,301
Balance at Sep. 30, 2020	$ 81,369	9,184	(48,164)	(20,180)	22,209
Balance (in shares) at Dec. 31, 2020	19,312
Balance at Dec. 31, 2020	$ 81,485	9,184	(48,904)	(21,698)	20,067
Share-based compensation (in shares)	60
Share-based compensation	$ 748	347			1,095
Vested restricted stock issued (in shares)	29
Vested restricted stock issued	$ 347	(347)			0
Shares cancelled to pay tax liability (in shares)	(39)
Shares cancelled to pay tax liability	$ (476)				(476)
Other comprehensive income - pension				442	442
Net income (loss)			945		945
Balance (in shares) at Jun. 30, 2021	19,362
Balance at Jun. 30, 2021	$ 82,104	9,184	(47,959)	(21,256)	22,073
Balance (in shares) at Dec. 31, 2020	19,312
Balance at Dec. 31, 2020	$ 81,485	9,184	(48,904)	(21,698)	20,067
Other comprehensive income - pension					663
Net income (loss)					806
Balance (in shares) at Sep. 30, 2021	19,373
Balance at Sep. 30, 2021	$ 82,243	9,184	(48,098)	(21,035)	22,294
Balance (in shares) at Jun. 30, 2021	19,362
Balance at Jun. 30, 2021	$ 82,104	9,184	(47,959)	(21,256)	22,073
Share-based compensation (in shares)
Share-based compensation		179			179
Vested restricted stock issued (in shares)	15
Vested restricted stock issued	$ 179	(179)			0
Shares cancelled to pay tax liability (in shares)	(4)
Shares cancelled to pay tax liability	$ (40)				(40)
Other comprehensive income - pension				221	221
Net income (loss)			(139)		(139)
Balance (in shares) at Sep. 30, 2021	19,373
Balance at Sep. 30, 2021	$ 82,243	$ 9,184	$ (48,098)	$ (21,035)	$ 22,294