Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

v3.21.2
Stockholders' Equity - Additional Information (Details) - USD ($)
9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Sep. 30, 2020
Class Of Stock [Line Items]      
Repurchase of common stock 34,935 212,728  
Payment for repurchase of common stock $ 409,000 $ 1,433,000  
Series E Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, outstanding 47,840   47,840
Repurchased shares of preferred stock   30,000  
Aggregate purchase price of convertible preferred stock   $ 3,000