Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 47,463	$ 52,122	$ 50,974	$ 42,366	$ 39,232	$ 38,231	$ 39,479	$ 36,671	$ 192,925	$ 153,612	$ 147,588
United States
Schedule of Revenue by Geographic Region [Line Items]
Revenue									136,111	107,228	106,052
Total International
Schedule of Revenue by Geographic Region [Line Items]
Revenue									$ 56,814	$ 46,384	$ 41,536
Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk, percentage									100.00%	100.00%	100.00%
Geographic Concentration Risk | Sales | United States
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk, percentage									70.60%	69.80%	71.90%
Geographic Concentration Risk | Sales | Total International
Schedule of Revenue by Geographic Region [Line Items]
Concentration risk, percentage									29.40%	30.20%	28.10%