Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 33,264	$ 29,784
Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	33,264	29,784
Concentration risk percentage	100.00%	100.00%
Europe | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	6,585	3,347
Concentration risk percentage	19.80%	11.20%
Direct | United States | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	23,988	24,727
Concentration risk percentage	72.10%	83.00%
Distributor | Latin America | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	918	572
Concentration risk percentage	2.80%	1.90%
Distributor | Asia/Pacific | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,773	1,138
Concentration risk percentage	5.30%	3.90%
Distributor | Total ROW | Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 2,691	$ 1,710
Concentration risk percentage	8.10%	5.80%