CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 50,235	$ 43,035
Cost of revenue	25,059	22,549
Gross margin	25,176	20,486
Operating expenses:
Research and development	9,844	8,479
Sales and marketing	11,447	10,135
General and administrative	5,717	4,813
Litigation settlement		400
Total operating expenses	27,008	23,827
Income (loss) from operations	(1,832)	(3,341)
Other income (expense), net:
Interest, net	38	5
Other income (expense), net	(144)	(95)
Total other income (expense), net	(106)	(90)
Income (loss) before income taxes	(1,938)	(3,431)
Income tax benefit	(2,781)	(10,070)
Net income	$ 843	$ 6,639
Net income per common share:
Basic (in dollars per share)	$ 0.04	$ 0.28
Diluted (in dollars per share)	$ 0.03	$ 0.28
Weighted-average number of shares:
Basic (in shares)	24,005	23,335
Diluted (in shares)	25,657	23,986