Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Details)

v3.21.1
Warrants - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Sep. 30, 2020
Class Of Warrant Or Right [Line Items]          
Fair value adjustment of warrants     $ 0 $ 368,000  
Series B Convertible Preferred Stock Warrants          
Class Of Warrant Or Right [Line Items]          
Warrants additional extended expiration period     2 years    
Fair value adjustment of warrants $ 0 $ 102,000 $ 0 $ 368,000  
Series B Convertible Preferred Stock Warrants | Series B Convertible Preferred Stock          
Class Of Warrant Or Right [Line Items]          
Number of warrants outstanding         118,029
Warrants exercise price         $ 20.80