Segment Information and Geographic Data (Tables)

9 Months Ended

Sep. 30, 2016

Geographic Areas Revenues From External Customers [Abstract]

Schedule of Revenue by Geographic Region

Revenue by geographic region, based on the physical location of the customer, is (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
United States	$	26,973		$	19,618		$	72,242		$	48,301
Foreign		3,172			1,276			7,092			3,095
Total revenue	$	30,145		$	20,894		$	79,334		$	51,396
Percentage of revenue generated outside of the United    States		11	%		6	%		9	%		6	%