Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 segment	Sep. 30, 2012
Segment Reporting Information [Line Items]
Number of reportable segments			1
Net revenue	$ 52,603	$ 48,223	$ 147,766	$ 150,529
United States
Segment Reporting Information [Line Items]
Net revenue	51,717	47,737	146,400	149,169
EMEA [Member]
Segment Reporting Information [Line Items]
Net revenue	0	3	2	12
Asia [Member]
Segment Reporting Information [Line Items]
Net revenue	$ 886	$ 483	$ 1,364	$ 1,348