Income Taxes - Components of the Net Deferred Tax (Liability) and Asset (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Deferred Tax Assets
Accrued Compensation	$ 2,371	$ 2,086
Stock Compensation	22,454	10,937
Capitalized Research & Development	324	625
California Alternative Minimum Tax	179	179
Net Operating Losses	185,431	151,007
Intangible Assets	3,562	2,818
Deferred Revenue		1,702
Right of Use Assets/Lease Liabilities	1,938	1,016
Capital Loss		710
Total deferred tax assets	216,259	171,080
Valuation allowance	(194,255)	(156,604)
Deferred tax liabilities:
Fixed Assets	(6,360)	(2,547)
State taxes	(15,644)	(11,929)
Total deferred tax liability	$ (22,004)	$ (14,476)