Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 25,509	$ 19,175	$ 50,028	$ 37,723
Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,972	719	3,559	2,063
Mexico and South America
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,202	1,323	2,115	2,836
Asia
Schedule of Revenue by Geographic Region [Line Items]
Revenue	984	535	1,948	864
Direct | United States
Schedule of Revenue by Geographic Region [Line Items]
Revenue	21,351	16,598	42,406	31,960
Direct | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,425	0	2,378	0
Distributor | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	547	719	1,181	2,063
Distributor | Total ROW
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 2,186	$ 1,858	$ 4,063	$ 3,700