Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of income taxes (Details)

v3.21.4
Income Taxes - Reconciliation of income taxes (Details)
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Reconciliation of income taxes at the statutory federal income tax rate to net income taxes    
U.S. federal income tax expense at the statutory rate (21.00%) (21.00%)
State income taxes, net of federal taxes (7.90%) (7.90%)
Stock-based compensation 1.20% 1.10%
Return to provision adjustment (14.20%)  
Other permanent items (1.10%) 0.80%
Change in valuation allowance 43.00% 27.00%
Income tax provision (benefit) 0.00%