Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
REVENUE	$ 32,412	$ 45,891	$ 211,656	$ 100,004
OPERATING EXPENSES
Research and development	72,180	59,325	213,930	140,576
General and administrative expenses	33,141	18,434	92,403	43,581
TOTAL OPERATING EXPENSES	105,321	77,759	306,333	184,157
OPERATING INCOME (LOSS)	(72,909)	(31,868)	(94,677)	(84,153)
OTHER INCOME
Interest income, net	1,240	1,280	3,450	4,972
Other income (expense)	(377)	664	675	1,707
TOTAL OTHER INCOME	863	1,944	4,125	6,679
INCOME (LOSS) BEFORE INCOME TAXES	(72,046)	(29,924)	(90,552)	(77,474)
Provision for income taxes	0	0	0	0
NET INCOME (LOSS)	$ (72,046)	$ (29,924)	$ (90,552)	$ (77,474)
NET INCOME (LOSS) PER SHARE - BASIC (in dollars per share)	$ (0.68)	$ (0.29)	$ (0.86)	$ (0.75)
NET INCOME (LOSS) PER SHARE - DILUTED (in dollars per share)	$ (0.68)	$ (0.29)	$ (0.86)	$ (0.75)
Weighted average shares outstanding - basic (in shares)	105,753	104,099	105,273	103,569
Weighted average shares outstanding - diluted (in shares)	105,753	104,099	105,273	103,569
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Foreign currency translation adjustments	$ (33)	$ (40)	$ (71)	$ 44
COMPREHENSIVE INCOME (LOSS)	$ (72,079)	$ (29,964)	$ (90,623)	$ (77,430)