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	2,897			2,897
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	1,356			1,356
Exercise of options and purchases from employee stock plans, Shares		160
Excess income tax benefit from share-based compensation	(13)			(13)
Purchase of treasury stock, value	(1,107)		$ (1,107)
Purchase of treasury stock, shares			(213)
Net loss	(5,354)				(5,354)
Other comprehensive income—net of tax	(1,394)					(1,394)
BALANCE - value at Sep. 30, 2015	252,083	$ 6	$ (1,107)	282,141	(26,829)	(2,128)
BALANCE - shares at Sep. 30, 2015		60,521	(213)
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	2,276			2,276
Share-based compensation, Shares		126
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	905			905
Exercise of options and purchases from employee stock plans, Shares		309
Net loss	(1,194)				(1,194)
Other comprehensive income—net of tax	579					579
BALANCE - value at Sep. 30, 2016	$ 254,577	$ 6	$ (1,433)	$ 286,266	$ (28,858)	$ (1,404)
BALANCE - shares at Sep. 30, 2016		61,215	(278)