CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 61,409	$ 53,215	$ 111,644	$ 96,250
Cost of revenue	29,993	27,188	55,052	49,737
Gross margin	31,416	26,027	56,592	46,513
Operating expenses:
Research and development	10,055	9,039	19,899	17,518
Sales and marketing	11,943	11,114	23,390	21,249
General and administrative	5,587	5,059	11,304	9,872
Litigation settlement				400
Total operating expenses	27,585	25,212	54,593	49,039
Income (loss) from operations	3,831	815	1,999	(2,526)
Other income (expense), net:
Interest, net	61		99	5
Other income (expense), net	248	(122)	104	(217)
Total other income (expense), net	309	(122)	203	(212)
Income (loss) before income taxes	4,140	693	2,202	(2,738)
Income tax expense (benefit)	247	169	(2,534)	(9,901)
Net income	$ 3,893	$ 524	$ 4,736	$ 7,163
Net income per common share:
Basic (in dollars per share)	$ 0.16	$ 0.02	$ 0.19	$ 0.31
Diluted (in dollars per share)	$ 0.15	$ 0.02	$ 0.18	$ 0.30
Weighted-average number of shares:
Basic (in shares)	24,587	23,162	24,298	23,248
Diluted (in shares)	26,388	23,930	26,024	23,958