CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)	Treasury stock
Beginning Balance at Dec. 31, 2009	$ 76,260	$ 27	$ 445,541	$ (387,916)	$ 18,911	$ (303)
Beginning Balance (in shares) at Dec. 31, 2009		26,722
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(4,685)			(4,685)
Other comprehensive income (loss), translation adjustments	393				393
Other comprehensive income (loss), pension liability adjustment	0
Issuance of shares		4,830
Issuance of shares	19,116	5	19,111
Purchase of restricted stock from employees		(16)
Purchase of restricted stock from employees	(71)					(71)
Issuance of shares for 401(k) plan contribution (in shares)	121	121
Issuance of shares for 401(k) plan contribution	541		206			335
Stock-based compensation (in shares)		514
Stock-based compensation	1,724		1,724
Ending Balance at Dec. 31, 2010	93,278	32	466,582	(392,601)	19,304	(39)
Ending Balance (in shares) at Dec. 31, 2010		32,171
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10,909			10,909
Other comprehensive income (loss), translation adjustments	(647)				(647)
Other comprehensive income (loss), pension liability adjustment	0
Purchase of restricted stock from employees		(70)
Purchase of restricted stock from employees	(388)					(388)
Issuance of shares for 401(k) plan contribution (in shares)	92	92
Issuance of shares for 401(k) plan contribution	602		602
Stock-based compensation (in shares)		504
Stock-based compensation	3,603	1	3,602
Ending Balance at Dec. 31, 2011	107,357	33	470,786	(381,692)	18,657	(427)
Ending Balance (in shares) at Dec. 31, 2011		32,697
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,335)			(5,335)
Other comprehensive income (loss), translation adjustments	2,169				2,169
Other comprehensive income (loss), pension liability adjustment	(290)				(290)
Purchase of restricted stock from employees		(124)
Purchase of restricted stock from employees	(600)					(600)
Issuance of shares for 401(k) plan contribution (in shares)	124	124
Issuance of shares for 401(k) plan contribution	666		12			654
Stock-based compensation (in shares)		324
Stock-based compensation	2,574		2,574
Ending Balance at Dec. 31, 2012	$ 106,541	$ 33	$ 473,372	$ (387,027)	$ 20,536	$ (373)
Ending Balance (in shares) at Dec. 31, 2012		33,021