Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 39,479	$ 38,327	$ 76,149	$ 71,591
Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 39,479	$ 38,327	$ 76,149	$ 71,591
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	$ 28,776	$ 27,992	$ 53,910	$ 51,980
Concentration risk percentage	72.90%	73.00%	70.80%	72.60%
Geographic Concentration Risk | Sales | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 7,888	$ 7,816	$ 15,134	$ 14,401
Concentration risk percentage	20.00%	20.40%	19.90%	20.10%
Geographic Concentration Risk | Sales | Rest of World (ROW): | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 2,815	$ 2,519	$ 7,105	$ 5,210
Concentration risk percentage	7.10%	6.60%	9.30%	7.30%
Geographic Concentration Risk | Sales | Latin America | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 1,221	$ 1,309	$ 3,260	$ 2,226
Concentration risk percentage	3.10%	3.40%	4.30%	3.10%
Geographic Concentration Risk | Sales | Asia/Pacific | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 1,594	$ 1,210	$ 3,845	$ 2,984
Concentration risk percentage	4.00%	3.20%	5.00%	4.20%