Income Taxes - Deferred (Details) - USD ($)	Sep. 30, 2022	Sep. 30, 2021
Deferred tax assets
Net operating loss carryforwards	$ 83,971,779	$ 67,778,970
Stock-based compensation	4,331,889	2,168,228
Lease liability	7,588	31,577
Research and development credit carryforward	11,166,153	8,842,001
Foreign tax credits	2,357,309	2,357,309
Accruals and others	815,310	348,605
Gross deferred tax assets	102,650,028	81,526,690
Less: valuation allowance	(102,630,250)	(81,449,372)
Deferred tax assets net of valuation allowance	19,778	77,318
Deferred tax liabilities:
Property and equipment		(45,995)
Right-of-use assets	$ (19,778)	$ (31,323)