Consolidated Statements of Changes in 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, 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 (loss)			498		498
Net income (loss)			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
Share-based compensation expense		705			705
Issuance of shares for incentive plan (in shares)	77
Issuance of shares for incentive plan	$ 951				951
Vested restricted stock issued (in shares)	66
Vested restricted stock issued	$ 705	(705)
Shares cancelled to pay tax liability (in shares)	(55)
Shares cancelled to pay tax liability	$ (653)				(653)
Other comprehensive gain (loss) - pension (Note 6)				1,006	1,006
Net income (loss)			(10,366)		(10,366)
Stock option excercised (in shares)	25
Stock option excercised	$ 192	(62)			130
Net income (loss)			(10,366)		(10,366)
Balance (in shares) at Dec. 31, 2019	19,238
Balance at Dec. 31, 2019	$ 80,606	$ 9,184	$ (46,300)	$ (20,798)	$ 22,692