Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement - Condensed Consolidated Statements of Comprehensive Loss [Line Items]
Net loss	$ (8,852)	$ (9,568)	$ (32,732)	$ (28,307)
Other comprehensive loss:
Foreign currency translation adjustments, net	(313)	(71)	(69)	(65)
Comprehensive loss	$ (9,165)	$ (9,639)	$ (32,801)	$ (28,372)