Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statements of Operations and Comprehensive Loss
Revenues	$ 28,161	$ 17,164
Operating expenses:
Cost of revenues	18,162	13,792
Research and development	14,000	10,297
Selling, general and administrative	28,792	26,405
Litigation settlement	0	22,500
Total operating expenses	60,954	72,994
Loss from operations	(32,793)	(55,830)
Interest income	134	564
Interest expense	(118)	(248)
Other income (expense), net	(77)	(87)
Loss before income taxes	(32,854)	(55,601)
Provision for income taxes	(46)	(37)
Net loss attributable to common stockholders	(32,900)	(55,638)
Other comprehensive loss:
Change in unrealized income/(loss) on investments	(8)	16
Foreign currency translation adjustment	63	(7)
Comprehensive loss	$ (32,845)	$ (55,629)
Net loss per share attributable to common stockholders—basic and diluted	$ (0.72)	$ (1.69)
Weighted average shares used in computing net loss per share attributable to common stockholders—basic and diluted	46,000	32,976