Consolidated Statements of Operations and Comprehensive Income (Loss) (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
REVENUE	$ 151,805	$ 32,811	$ 179,244	$ 54,113
OPERATING EXPENSES
Research and development	75,985	44,697	141,750	81,251
General and administrative expenses	34,267	16,346	59,262	25,147
TOTAL OPERATING EXPENSES	110,252	61,043	201,012	106,398
OPERATING INCOME (LOSS)	41,553	(28,232)	(21,768)	(52,285)
OTHER INCOME (EXPENSE)
Interest income, net	1,054	1,524	2,210	3,692
Other income (expense)	1,759	(110)	1,052	1,043
TOTAL OTHER INCOME (EXPENSE)	2,813	1,414	3,262	4,735
INCOME (LOSS) BEFORE INCOME TAXES	44,366	(26,818)	(18,506)	(47,550)
NET INCOME (LOSS)	$ 44,366	$ (26,818)	$ (18,506)	$ (47,550)
NET INCOME (LOSS) PER SHARE - BASIC	$ 0.42	$ (0.26)	$ (0.18)	$ (0.46)
NET INCOME (LOSS) PER SHARE - DILUTED	$ 0.41	$ (0.26)	$ (0.18)	$ (0.46)
Weighted average shares outstanding - basic	105,545	103,867	105,034	103,303
Weighted average shares outstanding - diluted	107,929	103,867	105,034	103,303
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Foreign currency translation adjustments	$ 1	$ (96)	$ (38)	$ 84
COMPREHENSIVE INCOME (LOSS)	$ 44,367	$ (26,914)	$ (18,544)	$ (47,466)