Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (31,700)	$ (24,024)	$ (95,407)	$ (54,397)
Other comprehensive loss:
Net unrealized losses on marketable securities	(583)	(319)	(3,238)	(1,108)
Total other comprehensive loss	(583)	(319)	(3,238)	(1,108)
Comprehensive loss	$ (32,283)	$ (24,343)	$ (98,645)	$ (55,505)