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	1,057			1,057
Share-based compensation, Shares		67
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(13)			(13)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		3
Exercise of options and purchases from employee stock plans, Value	736			736
Exercise of options and purchases from employee stock plans, Shares		139
Excess income tax benefit from share-based compensation	8			8
Net loss	(8,390)				(8,390)
Other comprehensive income (loss)—net of tax	(808)					(808)
BALANCE - value at Mar. 31, 2015	248,553	$ 6		279,954	(29,865)	(1,542)
BALANCE - shares at Mar. 31, 2015		60,379
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	927			927
Share-based compensation, Shares		81
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	(4,035)				(4,035)
Other comprehensive income (loss)—net of tax	409					409
BALANCE - value at Mar. 31, 2016	$ 249,889	$ 6	$ (1,433)	$ 284,589	$ (31,699)	$ (1,574)
BALANCE - shares at Mar. 31, 2016		60,934	(278)