Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 26,696	$ 22,302	$ 76,725	$ 60,025
Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	2,123	640	5,683	2,703
Mexico and South America
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,670	354	3,785	3,190
Asia
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,614	988	3,562	1,852
Direct | United States
Schedule of Revenue by Geographic Region [Line Items]
Revenue	21,289	20,320	63,695	52,280
Direct | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,692	0	4,071	0
Distributor | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	431	640	1,612	2,703
Distributor | Total ROW
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 3,284	$ 1,342	$ 7,347	$ 5,042