Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings
Beginning Balance, shares (in shares) at Dec. 31, 2017		28,860,961
Beginning Balance, Treasury stock, shares (in shares) at Dec. 31, 2017			(711,231)
Beginning Balance, amount at Dec. 31, 2017	$ 231,266	$ 288	$ (6,540)	$ (26)	$ 174,697	$ 62,847
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	334				334
Exercise of stock options (in shares)		146,765
Exercise of stock options	816	$ 2			814
Cash flow hedge, net of tax	269			269
Net loss	$ 4,101					4,101
Ending Balance, shares (in shares) at Mar. 31, 2018	29,007,726
Ending Balance, Treasury stock, shares (in shares) at Mar. 31, 2018			(711,231)
Ending Balance, amount at Mar. 31, 2018	$ 236,500	$ 290	$ (6,540)	243	175,845	66,662
Beginning Balance, shares (in shares) at Dec. 31, 2017		28,860,961
Beginning Balance, Treasury stock, shares (in shares) at Dec. 31, 2017			(711,231)
Beginning Balance, amount at Dec. 31, 2017	$ 231,266	$ 288	$ (6,540)	(26)	174,697	62,847
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	231,470
Net loss	$ 6,350
Ending Balance, shares (in shares) at Jun. 30, 2018	29,422,432
Ending Balance, Treasury stock, shares (in shares) at Jun. 30, 2018			(711,231)
Ending Balance, amount at Jun. 30, 2018	$ 240,126	293	$ (6,540)	320	177,142	68,911
Beginning Balance, shares (in shares) at Mar. 31, 2018	29,007,726
Beginning Balance, Treasury stock, shares (in shares) at Mar. 31, 2018			(711,231)
Beginning Balance, amount at Mar. 31, 2018	$ 236,500	$ 290	$ (6,540)	243	175,845	66,662
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 817				817
Exercise of stock options (in shares)	84,705	84,705
Exercise of stock options	$ 483	$ 0			483
Issuance of restricted stock (in shares)		331,095
Issuance of restricted stock	0	$ 3			(3)
Cash flow hedge, net of tax	77			77
Forfeiture of restricted stock (in shares)		(1,094)
Net loss	$ 2,249					2,249
Ending Balance, shares (in shares) at Jun. 30, 2018	29,422,432
Ending Balance, Treasury stock, shares (in shares) at Jun. 30, 2018			(711,231)
Ending Balance, amount at Jun. 30, 2018	$ 240,126	$ 293	$ (6,540)	320	177,142	68,911
Beginning Balance, shares (in shares) at Dec. 31, 2018	29,611,989	29,611,989
Beginning Balance, Treasury stock, shares (in shares) at Dec. 31, 2018	(711,231)		(711,231)
Beginning Balance, amount at Dec. 31, 2018	$ 141,585	$ 296	$ (6,540)	(52)	179,742	(31,861)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	664				664
Exercise of stock options (in shares)		7,021
Exercise of stock options	35	$ 0			35
Issuance of restricted stock (in shares)		185,204
Issuance of restricted stock	0	$ 1			(1)
Cash flow hedge, net of tax	(284)			(284)
Forfeiture of restricted stock (in shares)		(18,207)
Net loss	$ (7,924)					(7,924)
Ending Balance, shares (in shares) at Mar. 31, 2019	29,786,007
Ending Balance, Treasury stock, shares (in shares) at Mar. 31, 2019			(711,231)
Ending Balance, amount at Mar. 31, 2019	$ 134,076	$ 297	$ (6,540)	(336)	180,440	(39,785)
Beginning Balance, shares (in shares) at Dec. 31, 2018	29,611,989	29,611,989
Beginning Balance, Treasury stock, shares (in shares) at Dec. 31, 2018	(711,231)		(711,231)
Beginning Balance, amount at Dec. 31, 2018	$ 141,585	$ 296	$ (6,540)	(52)	179,742	(31,861)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	7,021
Net loss	$ (9,557)
Ending Balance, shares (in shares) at Jun. 30, 2019	30,215,084
Ending Balance, Treasury stock, shares (in shares) at Jun. 30, 2019	(711,231)		(711,231)
Ending Balance, amount at Jun. 30, 2019	$ 132,749	302	$ (6,540)	(1,094)	181,499	(41,418)
Beginning Balance, shares (in shares) at Mar. 31, 2019	29,786,007
Beginning Balance, Treasury stock, shares (in shares) at Mar. 31, 2019			(711,231)
Beginning Balance, amount at Mar. 31, 2019	$ 134,076	$ 297	$ (6,540)	(336)	180,440	(39,785)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 1,064				1,064
Exercise of stock options (in shares)	0
Issuance of restricted stock (in shares)		479,590
Issuance of restricted stock	$ 0	$ 6			(6)
Cash flow hedge, net of tax	(758)			(758)
Forfeiture of restricted stock (in shares)		(50,513)
Forfeiture of restricted stock	0	$ (1)			1
Net loss	$ (1,633)					(1,633)
Ending Balance, shares (in shares) at Jun. 30, 2019	30,215,084
Ending Balance, Treasury stock, shares (in shares) at Jun. 30, 2019	(711,231)		(711,231)
Ending Balance, amount at Jun. 30, 2019	$ 132,749	$ 302	$ (6,540)	$ (1,094)	$ 181,499	$ (41,418)