Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Balance (in shares) at Dec. 31, 2015		11,946,000
Balance at Dec. 31, 2015	$ 93,777	$ 119	$ 67,370	$ 65,871	$ (39,583)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		2,000
Exercise of stock options	3		3
Excess tax benefit on exercise of stock options	(135)		(135)
Transfer of stock into (out of) treasury stock	(28,412)		(40)		(28,372)
Stock-based compensation	976		976
Restricted stock award grant (in shares)		319,000
Restricted stock award grant		$ 4	(4)
Forfeited restricted stock (in shares)		(102,000)
Restricted Stock Award, Forfeitures		$ (1)	1
Net share settlement related to restricted stock vesting (in shares)		(9,000)
Net share settlement related to restricted stock vesting	(104)		(104)
Net income (loss)	(7,699)			(7,699)
Balance (in shares) at Dec. 31, 2016		12,156,000
Balance at Dec. 31, 2016	58,463	$ 122	68,041	58,172	(67,872)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	459		459
Restricted stock award grant (in shares)		199,000
Restricted stock award grant		$ 1	(1)
Forfeited restricted stock (in shares)		(213,000)
Restricted Stock Award, Forfeitures		$ (2)	2
Net share settlement related to restricted stock vesting	2		2
Net income (loss)	7,497			7,497
Issuance of treasury stock	(58)		(170)		112
Balance (in shares) at Dec. 31, 2017		12,142,000
Balance at Dec. 31, 2017	66,488	$ 121	68,667	65,460	(67,760)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,164		1,164
Restricted stock award grant (in shares)		0
Restricted stock award grant		$ 0	750
Forfeited restricted stock (in shares)		(128,000)
Restricted Stock Award, Forfeitures		$ (1)	1
Net share settlement related to restricted stock vesting (in shares)		(2,000)
Net share settlement related to restricted stock vesting	(136)		(136)
Net income (loss)	12,204			12,204
Issuance of treasury stock	0		(4,013)		4,013
Balance (in shares) at Dec. 31, 2018		12,012,000
Balance at Dec. 31, 2018	$ 80,470	$ 120	$ 66,433	$ 77,664	$ (63,747)