CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 43,035	$ 32,083
Cost of revenue	22,549	16,472
Gross margin	20,486	15,611
Operating expenses:
Research and development	8,479	7,995
Sales and marketing	10,135	7,367
General and administrative	4,813	4,621
Litigation settlement	400
Total operating expenses	23,827	19,983
Loss from operations	(3,341)	(4,372)
Other income (expense), net:
Interest, net	5	21
Other expense	(95)	(410)
Total other income (expense), net	(90)	(389)
Loss before income taxes	(3,431)	(4,761)
Income tax benefit	(10,070)	(530)
Net income (loss)	$ 6,639	$ (4,231)
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.28	$ (0.17)
Diluted (in dollars per share)	$ 0.28	$ (0.17)
Weighted-average number of shares:
Basic (in shares)	23,335	24,344
Diluted (in shares)	23,986	24,344