CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 60,425	$ 59,149
Cost of revenue	31,142	28,410
Gross margin	29,283	30,739
Operating expenses:
Research and development	11,817	10,940
Sales and marketing	13,342	12,535
General and administrative	7,117	6,293
Total operating expenses	32,276	29,768
Income (loss) from operations	(2,993)	971
Other income (expense), net:
Interest, net	344	236
Other income (expense), net	(87)	(357)
Total other income (expense), net	257	(121)
Income (loss) before income taxes	(2,736)	850
Income tax benefit	(766)	(116)
Net income (loss)	$ (1,970)	$ 966
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.07)	$ 0.04
Diluted (in dollars per share)	$ (0.07)	$ 0.04
Weighted-average number of shares:
Basic (in shares)	26,563	25,904
Diluted (in shares)	26,563	27,526