Equity Incentive Plans - General Information (Details)	12 Months Ended
	Sep. 30, 2022 shares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)	2,431,324
2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)	2,800,000
Shares authorized, plan (in shares)	2,500,000
Shares authorized, may be issued if outstanding awards granted under the 2000 Plan or the 2015 Plan are forfeited, expire or are cancelled (in shares)	300,000