Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Comprehensive Income (Loss)
Balance at Dec. 31, 2008	$ 319,377	$ 103	$ 483,546	$ (1,218)	$ (198,479)	$ 35,425
Balance (in shares) at Dec. 31, 2008		103,400
Comprehensive income (loss)
Net income (loss)	(77,468)				(77,468)		(77,468)
Foreign currency translation adjustments	(30,239)					(30,239)	(30,239)
Change in pension	(47)					(47)	(47)
Total comprehensive income (loss)	(107,754)						(107,754)
Exercise of stock options	45	1	44
Exercise of stock options (in shares)		66
Issuance of shares under Employee Stock Purchase Plan	184		184
Issuance of shares under Employee Stock Purchase Plan (in shares)		302
Issuance of restricted common shares	(104)		(104)
Issuance of restricted common shares (in shares)		444
Stock-based compensation expense	4,651		4,651
Balance at Dec. 31, 2009	216,399	104	488,321	(1,218)	(275,947)	5,139
Balance (in shares) at Dec. 31, 2009		104,212
Comprehensive income (loss)
Net income (loss)	(17,573)				(17,573)		(17,573)
Foreign currency translation adjustments	1,535					1,535	1,535
Change in pension	(442)					(442)	(442)
Total comprehensive income (loss)	(16,480)						(16,480)
Exercise of stock options	553	1	552
Exercise of stock options (in shares)		704
Issuance of shares under Employee Stock Purchase Plan	638	1	637
Issuance of shares under Employee Stock Purchase Plan (in shares)		280
Issuance of restricted common shares	(201)		(201)
Issuance of restricted common shares (in shares)		262
Issuance of restricted shares in satisfaction of accrued compensation	570		570
Issuance of restricted shares in satisfaction of accrued compensation (in shares)		448
Stock-based compensation expense	4,088		4,088
Balance at Dec. 31, 2010	205,567	106	493,967	(1,218)	(293,520)	6,232
Balance (in shares) at Dec. 31, 2010		105,906
Comprehensive income (loss)
Net income (loss)	5,077				5,077		5,077
Foreign currency translation adjustments	(1,466)					(1,466)	(1,466)
Change in pension	11					11	11
Total comprehensive income (loss)	3,622						3,622
Exercise of stock options	288		288
Exercise of stock options (in shares)		372
Issuance of shares under Employee Stock Purchase Plan	503	1	502
Issuance of shares under Employee Stock Purchase Plan (in shares)		398
Issuance of restricted common shares	(112)		(112)
Issuance of restricted common shares (in shares)		133
Stock-based compensation expense	4,687		4,687
Balance at Dec. 31, 2011	$ 214,555	$ 107	$ 499,332	$ (1,218)	$ (288,443)	$ 4,777
Balance (in shares) at Dec. 31, 2011		106,809