Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 33,260	$ 26,696	$ 97,008	$ 76,725
Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	3,471	2,123	10,943	5,683
Europe | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk percentage	10.40%	8.00%	11.30%	7.40%
Direct | United States
Schedule of Revenue by Geographic Region [Line Items]
Revenue	26,508	21,289	77,578	63,695
Direct | United States | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk percentage	79.70%	79.70%	80.00%	83.00%
Distributor | Latin America
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,600	1,670	3,853	3,785
Distributor | Latin America | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk percentage	4.80%	6.30%	4.00%	4.90%
Distributor | Asia/Pacific
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,681	1,614	4,634	3,562
Distributor | Asia/Pacific | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk percentage	5.10%	6.00%	4.70%	4.60%
Distributor | Total ROW
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 3,281	$ 3,284	$ 8,487	$ 7,347
Distributor | Total ROW | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk percentage	9.90%	12.30%	8.70%	9.60%