Revenue by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 37,150	$ 33,260	$ 108,741	$ 97,008
Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	37,150	33,260	108,741	97,008
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk | Sales | United States | Direct
Schedule of Revenue by Geographic Region [Line Items]
Revenue	27,067	26,508	79,048	77,578
Concentration risk percentage	72.90%	79.70%	72.70%	80.00%
Geographic Concentration Risk | Sales | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	6,937	3,471	21,337	10,943
Concentration risk percentage	18.70%	10.40%	19.60%	11.30%
Geographic Concentration Risk | Sales | Latin America | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,858	1,600	4,085	3,853
Concentration risk percentage	5.00%	4.80%	3.80%	4.00%
Geographic Concentration Risk | Sales | Asia/Pacific | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	1,288	1,681	4,271	4,634
Concentration risk percentage	3.50%	5.10%	3.90%	4.70%
Geographic Concentration Risk | Sales | Total ROW | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 3,146	$ 3,281	$ 8,356	$ 8,487
Concentration risk percentage	8.50%	9.90%	7.70%	8.70%