Consolidated Statements of Stockholders' Equity - 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, 2016	18,958
Balance at Dec. 31, 2016	$ 78,123	$ 9,246	$ (47,332)	$ (22,295)	$ 17,742
Share-based compensation expense		448			448
Issuance of shares for incentive plan (in shares)	94
Issuance of shares for incentive plan	$ 767				767
Vested restricted stock issued (in shares)	59
Vested restricted stock issued	$ 448	(448)
Shares cancelled to pay tax liability (in shares)	(71)
Shares cancelled to pay tax liability	$ (754)				(754)
Other comprehensive gain (loss) - pension (Note 6)				2,041	2,041
Net income			10,900		10,900
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 expense		563			563
Issuance of shares for incentive plan (in shares)	71
Issuance of shares for incentive plan	$ 845				845
Vested restricted stock issued (in shares)	64
Vested restricted stock issued	$ 563	(563)
Shares cancelled to pay tax liability (in shares)	(50)
Shares cancelled to pay tax liability	$ (581)				(581)
Other comprehensive gain (loss) - pension (Note 6)				(1,550)	(1,550)
Net income			498		498
Balance (in shares) at Dec. 31, 2018	19,125
Balance at Dec. 31, 2018	$ 79,411	$ 9,246	$ (35,934)	$ (21,804)	$ 30,919