Condensed Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
BALANCE - value at Dec. 31, 2014	$ 255,963	$ 6		$ 278,166	$ (21,475)	$ (734)
BALANCE - shares at Dec. 31, 2014		60,170
Share-based compensation, Value	2,058			2,058
Share-based compensation, Shares		93
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(265)			(265)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		98
Exercise of options and purchases from employee stock plans, Value	846			846
Exercise of options and purchases from employee stock plans, Shares		160
Excess income tax benefit from share-based compensation	(13)			(13)
Net loss	(5,666)				(5,666)
Other comprehensive income—net of tax	(755)					(755)
BALANCE - value at Jun. 30, 2015	252,168	$ 6		280,792	(27,141)	(1,489)
BALANCE - shares at Jun. 30, 2015		60,521
BALANCE - value at Dec. 31, 2015	252,173	$ 6	$ (1,433)	283,247	(27,664)	(1,983)
BALANCE - shares at Dec. 31, 2015		60,709	(278)
Share-based compensation, Value	2,006			2,006
Share-based compensation, Shares		102
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(162)			(162)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		71
Exercise of options and purchases from employee stock plans, Value	415			415
Exercise of options and purchases from employee stock plans, Shares		144
Net loss	(5,754)				(5,754)
Other comprehensive income—net of tax	557					557
BALANCE - value at Jun. 30, 2016	$ 249,235	$ 6	$ (1,433)	$ 285,506	$ (33,418)	$ (1,426)
BALANCE - shares at Jun. 30, 2016		61,026	(278)