Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Treasury Stock, Shares	(1,659,000)
Beginning Balance at Dec. 31, 2014	$ 116,540	$ 172	$ 121,084	$ 11,881	$ (3,447)	$ (13,150)
Beginning Balance, Shares at Dec. 31, 2014		17,153,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	2,253			2,253
Other comprehensive (loss) income	(4,153)				(4,153)
Stock-based compensation	3,734		3,734
Payment of Stock Registration Fee	0
Issuance of common stock under employee stock purchase plan	291		291
Common stock issued under benefit plan, shares		28,000
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements	(578)		(578)
Payment of restricted stock withholdings, shares		(27,000)
Exercise of stock options and issuance of restricted stock awards, net of forfeitures	$ 89	$ 1	88
Exercise of stock options, vesting of restricted stock awards		182,000
Ending Balance, Shares at Dec. 31, 2015	15,677,323	17,336,000
Ending Balance at Dec. 31, 2015	$ 118,176	$ 173	124,619	14,134	(7,600)	(13,150)
Treasury Stock, Shares	(1,658,991)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (7,517)			(7,517)
Other comprehensive (loss) income	(9,209)				(9,209)
Stock-based compensation	3,651		3,651
Payment of Stock Registration Fee	(4)
Issuance of common stock under employee stock purchase plan	146		146
Common stock issued under benefit plan, shares		18,000
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements	(313)		(313)
Deferred Tax Expense from Stock Options Exercised			(869)
Payment of restricted stock withholdings, shares		(32,000)
Exercise of stock options and issuance of restricted stock awards, net of forfeitures	$ 2,437	$ 11	2,426
Exercise of stock options, vesting of restricted stock awards		1,099,000
Ending Balance, Shares at Dec. 31, 2016	16,761,923	18,421,000
Ending Balance at Dec. 31, 2016	$ 106,502	$ 184	129,660	6,617	(16,809)	(13,150)
Treasury Stock, Shares	(1,658,991)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (11,034)			(11,034)
Other comprehensive (loss) income	5,492				5,492
Stock-based compensation	3,518		3,518
Payment of Stock Registration Fee	0
Issuance of common stock under employee stock purchase plan	358		358
Common stock issued under benefit plan, shares		47,000
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements	(392)		(392)
Payment of restricted stock withholdings, shares		(43,000)
Exercise of stock options and issuance of restricted stock awards, net of forfeitures	$ 1,221	$ 4	1,217
Exercise of stock options, vesting of restricted stock awards		363,000
Ending Balance, Shares at Dec. 31, 2017	17,128,825	18,788,000
Ending Balance at Dec. 31, 2017	$ 105,665	$ 188	$ 134,361	$ (4,417)	$ (11,317)	$ (13,150)
Treasury Stock, Shares	(1,658,991)