Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 segment	Jun. 30, 2011
Segment Reporting [Abstract]
Number of reportable segments			1
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 47,769	$ 53,179	$ 102,513	$ 102,353
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	47,402	52,594	101,529	100,665
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	4	14	9	59
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 363	$ 571	$ 975	$ 1,629