Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Details)

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Warrants - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 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 $ 0 $ 368,000 $ 0
Number of common shares into which each warrant may be exchanged   5