Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Treasury Stock	Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings	Total
Beginning balance, shares at Dec. 31, 2016	28,405,850
Beginning balance at Dec. 31, 2016	$ 283	$ (6,540)	$ (382)	$ 171,079	$ 61,764	$ 226,204
Beginning treasury stock, shares at Dec. 31, 2016		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				2,303		2,303
Deferred tax adjustment					683	$ 683
Exercise of stock options, shares	229,551					229,551
Exercise of stock options	$ 2			1,318		$ 1,320
Issue restricted stock, shares	345,913
Issuance of restricted stock	$ 3			(3)
Cash flow hedge, net of tax			356			356
Forfeiture of restricted stock (in shares)	(120,353)
Net (loss) income					400	400
Ending balance, shares at Dec. 31, 2017	28,860,961
Ending treasury stock, shares at Dec. 31, 2017		(711,231)
Ending balance at Dec. 31, 2017	$ 288	$ (6,540)	(26)	174,697	62,847	231,266
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				2,238		$ 2,238
Exercise of stock options, shares	488,303					488,303
Exercise of stock options	$ 5			2,810		$ 2,815
Issue restricted stock, shares	333,864
Issuance of restricted stock	$ 3			(3)
Cash flow hedge, net of tax			(26)			(26)
Forfeiture of restricted stock (in shares)	(71,139)
Net (loss) income					(94,422)	$ (94,422)
Ending balance, shares at Dec. 31, 2018	29,611,989					29,611,989
Ending treasury stock, shares at Dec. 31, 2018		(711,231)				(711,231)
Ending balance at Dec. 31, 2018	$ 296	$ (6,540)	(52)	179,742	(31,861)	$ 141,585
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASC 606 (Note 2) | ASU 2014-09					(286)	(286)
Stock-based compensation				2,753		$ 2,753
Exercise of stock options, shares	7,021					7,021
Exercise of stock options	$ 8			35		$ 35
Issue restricted stock, shares	757,012
Issuance of restricted stock				(8)
Cash flow hedge, net of tax			(993)			(993)
Forfeiture of restricted stock (in shares)	(72,627)
Forfeiture of restricted stock	$ (1)			1
Net (loss) income					(5,359)	$ (5,359)
Ending balance, shares at Dec. 31, 2019	30,303,395					30,303,395
Ending treasury stock, shares at Dec. 31, 2019		(711,231)				(711,231)
Ending balance at Dec. 31, 2019	$ 303	$ (6,540)	$ (1,045)	$ 182,523	$ (37,220)	$ 138,021