Stock-Based Compensation - Stock option activity (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Other option information
Stock-based compensation expense	$ 7,710,804	$ 4,887,287
Stock options
Number of Shares
Balance, Beginning (in shares)	16,110,015	3,762,143
Granted (in shares)	4,039,566	12,461,645
Exercised (in shares)	(25,000)
Forfeited or expired (in shares)		(113,773)
Balance, Ending (in shares)	20,124,581	16,110,015
Exercisable (in shares)	8,353,802
Vested and expected to vest (in shares)	20,124,581
Weighted Average Exercise Price
Balance, Beginning (in dollars per share)	$ 1.46	$ 2.01
Granted (in dollars per share)	1.60	1.29
Exercised (in dollars per share)	0.71
Forfeited or expired (in dollars per share)		0.76
Balance, Ending (in dollars per share)	1.49	1.46
Exercisable (in dollars per share)	1.53
Vested and expected to vest (in dollars per share)	$ 1.49
Other option information
Balance-Remaining contractual term	8 years 3 months 18 days
Exercisable-Remaining contractual term	7 years 10 months 24 days
Vested and expected to vest-Remaining contractual term	8 years 3 months 18 days
Aggregate intrinsic value, Exercised	$ 38,960
Aggregate intrinsic value, Exercisable	2,067,210
Aggregate intrinsic value, Vested and expected to vest	$ 4,521,960
Term of award	10 years
Grant date fair value of options (in dollars per share)	$ 1.23	$ 0.98
Stock options | Minimum
Other option information
Vesting period	1 year
Stock options | Maximum
Other option information
Vesting period	4 years
Performance-based stock options
Number of Shares
Balance, Beginning (in shares)	1,000,000
Granted (in shares)	1,900,000	1,000,000
Forfeited or expired (in shares)	(2,200,000)
Balance, Ending (in shares)	700,000	1,000,000
Exercisable (in shares)	700,000
Vested and expected to vest (in shares)	700,000
Weighted Average Exercise Price
Balance, Beginning (in dollars per share)	$ 2.42
Granted (in dollars per share)	1.44	$ 2.42
Forfeited or expired (in dollars per share)	1.89
Balance, Ending (in dollars per share)	1.44	2.42
Exercisable (in dollars per share)	1.44
Vested and expected to vest (in dollars per share)	$ 1.44
Other option information
Balance-Remaining contractual term	9 years 2 months 12 days
Exercisable-Remaining contractual term	9 years 2 months 12 days
Vested and expected to vest-Remaining contractual term	9 years 2 months 12 days
Term of award	10 years
Grant date fair value of options (in dollars per share)	$ 1.03	$ 1.76
Stock-based compensation expense	$ 718,950
Number of stock options vested	700,000