Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings
Beginning balance, shares at Dec. 31, 2014		27,969,783
Beginning balance at Dec. 31, 2014	$ 236,717	$ 279	$ (3,439)	$ 0	$ 166,433	$ 73,444
Beginning treasury stock, shares at Dec. 31, 2014			(361,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 2,275				2,275
Exercise of stock options, shares	3,970	3,970
Exercise of stock options	$ 28	$ 0			28
Issue restricted stock, shares		38,660
Cash flow hedge, net of tax	(145)			(145)
Forfeiture of restricted stock		19,824
Purchase of stock into treasury, shares			(350,000)
Purchase of shares into treasury	(3,101)		$ (3,101)
Net income (loss)	(8,060)					(8,060)
Ending balance, shares at Dec. 31, 2015		27,992,589
Ending balance at Dec. 31, 2015	227,714	$ 279	$ (6,540)	(145)	168,736	65,384
Ending treasury stock, shares at Dec. 31, 2015			(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 2,280				2,280
Exercise of stock options, shares	13,850	13,850
Exercise of stock options	$ 67	$ 0			67
Issue restricted stock, shares		407,002
Issuance of restricted stock	0	$ 4			(4)
Cash flow hedge, net of tax	(237)			(237)
Forfeiture of restricted stock		(7,591)
Net income (loss)	$ (3,620)					(3,620)
Ending balance, shares at Dec. 31, 2016	28,405,850	28,405,850
Ending balance at Dec. 31, 2016	$ 226,204	$ 283	$ (6,540)	(382)	171,079	61,764
Ending treasury stock, shares at Dec. 31, 2016	(711,231)		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 2,303				2,303
Exercise of stock options, shares	229,551	229,551
Exercise of stock options	$ 1,320	$ 2			1,318
Issue restricted stock, shares		345,913
Issuance of restricted stock	0	$ 3			(3)
Cash flow hedge, net of tax	356			356
Forfeiture of restricted stock		(120,353)
Net income (loss)	$ 400					400
Ending balance, shares at Dec. 31, 2017	28,860,961	28,860,961
Ending balance at Dec. 31, 2017	$ 231,266	$ 288	$ (6,540)	$ (26)	$ 174,697	62,847
Ending treasury stock, shares at Dec. 31, 2017	(711,231)		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Deferred tax adjustments	$ 683					$ 683