Segment Information and Geographic Data - Schedule of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	$ 30,145	$ 20,894	$ 79,334	$ 51,396
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	26,973	19,618	72,242	48,301
Foreign
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	$ 3,172	$ 1,276	$ 7,092	$ 3,095
Sales Revenue | Customer Concentration Risk | Non Us
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of revenue generated outside of the United States	11.00%	6.00%	9.00%	6.00%