Unaudited Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue	$ 82,223	$ 60,136
Cost of revenue	34,592	27,590
Gross profit	47,631	32,546
Operating expenses:
Research and development	44,399	42,938
Sales and marketing	11,879	11,342
General and administrative	6,833	6,218
Total operating expenses	63,111	60,498
Loss from operations	(15,480)	(27,952)
Interest expense	(8,423)	(7,715)
Other income	2,378	4,415
Loss before income taxes	(21,525)	(31,252)
Provision (benefit) for income taxes	1,220	(8,261)
Net loss	$ (22,745)	$ (22,991)
Earnings per share:
Basic earnings per share (in dollars per share)	$ (0.51)	$ (0.53)
Diluted earnings per share (in dollars per share)	$ (0.51)	$ (0.53)
Weighted-average shares used in computing earnings per share:
Basic (in shares)	44,451,392	42,998,819
Diluted (in shares)	44,451,392	42,998,819