Supplemental Disclosure of Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Disclosure of Cash Flow Information

Schedule of supplemental cash flow information

	Years Ended
	December 31,
	2016		2015		2014
Supplemental disclosure of cash flow activities:
Cash paid for income taxes	$	941	$	505	$	—
Cash paid for interest expense	$	12	$	10	$	5
Supplemental disclosure of non-cash investing and financing activities:
Common stock issued for settlement of restricted stock unit awards	$	1,020	$	1,308	$	1,087
Purchase of property and equipment in accounts payable and accrued expenses	$	158	$	1,093	$	365
Contingent consideration on acquisition	$	—	$	926	$	—