Annual report pursuant to Section 13 and 15(d)

Warrants - Summary of Information Assuming Warrants are Exercised and Exchanged for Common Shares (Details)

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Warrants - Summary of Information Assuming Warrants are Exercised and Exchanged for Common Shares (Details) - Series B Convertible Preferred Stock Warrants - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Class Of Warrant Or Right [Line Items]    
Outstanding and Exercisable, Number of Common Shares to be Issued 590,147 590,147
Outstanding and Exercisable, Weighted Average Exercise Price Per Common Share $ 4.16 $ 4.16
Outstanding and Exercisable, Weighted Average Remaining Contractual Term (in years) 1 year 4 months 6 days 6 months 10 days
Outstanding and Exercisable, Intrinsic Value $ 2,820 $ 2,602