Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained (Deficit) [Member]
BALANCE at Dec. 31, 2011	$ 31,713	$ 297	$ 213,282	$ (125,389)	$ (99)	$ (56,378)
BALANCE, Shares at Dec. 31, 2011		29,736		(18,425)
Issuance of common stock related to employee stock plans	763		(1,463)	2,226
Issuance of common stock related to employee stock plans, Shares				280
Repurchases of common stock	(2,643)			(2,643)
Repurchases of common stock, Shares				(694)
Share-based compensation expense	1,419		1,419
Currency translation adjustment	(24)				(24)
Net income	1,447					1,447
BALANCE at Dec. 31, 2012	32,675	297	213,238	(125,806)	(123)	(54,931)
BALANCE, Shares at Dec. 31, 2012		29,736		(18,839)
Issuance of common stock related to employee stock plans	1,278		(2,855)	4,133
Issuance of common stock related to employee stock plans, Shares				517
Repurchases of common stock	(1,513)			(1,513)
Repurchases of common stock, Shares	365			(365)
Share-based compensation expense	1,469		1,469
Currency translation adjustment	(31)				(31)
Net income	34,708					34,708
BALANCE at Dec. 31, 2013	68,586	297	211,852	(123,186)	(154)	(20,223)
BALANCE, Shares at Dec. 31, 2013		29,736		(18,687)
Issuance of common stock related to employee stock plans	1,900		(2,375)	4,275
Issuance of common stock related to employee stock plans, Shares				534
Repurchases of common stock	(967)			(967)
Repurchases of common stock, Shares	143			(143)
Share-based compensation expense	1,512		1,512
Currency translation adjustment	(66)				(66)
Net income	4,064					4,064
BALANCE at Dec. 31, 2014	$ 75,029	$ 297	$ 210,989	$ (119,878)	$ (220)	$ (16,159)
BALANCE, Shares at Dec. 31, 2014		29,736		(18,296)