Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Details)

v3.20.2
Warrants - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Class Of Warrant Or Right [Line Items]        
Fair value adjustment of warrants     $ 368,000 $ 0
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 $ 102,000 $ 0 $ 368,000 $ 0
Number of common shares into which each warrant may be exchanged 5   5