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Warrants - Summary of Warrants Outstanding and Exercisable (Details) - $ / shares | Sep. 30, 2020 | Sep. 30, 2019
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Series B Convertible Preferred Warrants Exercise Price $16.60 |  |
Class Of Warrant Or Right [Line Items] |  |
Number of warrants outstanding and exercisable | 54,396 |
Warrants exercise price, outstanding and exercisable | $ 16.60 |
Series B Convertible Preferred Warrants Exercise Price $16.80 |  |
Class Of Warrant Or Right [Line Items] |  |
Number of warrants outstanding and exercisable | 17,857 |
Warrants exercise price, outstanding and exercisable | $ 16.80 |
Series B Convertible Preferred Warrants Exercise Price $24.30 |  |
Class Of Warrant Or Right [Line Items] |  |
Number of warrants outstanding and exercisable | 12,383 |
Warrants exercise price, outstanding and exercisable | $ 24.30 |
Series B Convertible Preferred Warrants Exercise Price $28.50 |  |
Class Of Warrant Or Right [Line Items] |  |
Number of warrants outstanding and exercisable | 33,393 |
Warrants exercise price, outstanding and exercisable | $ 28.50 |
Series B Convertible Preferred Stock Warrants |  |
Class Of Warrant Or Right [Line Items] |  |
Number of warrants outstanding and exercisable | 118,029 | 118,029
Warrants exercise price, outstanding and exercisable | $ 20.80 | $ 20.80

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- Definition Class of warrant or right outstanding and exercisable. + References No definition available. + Details
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- Definition Weighted average exercise price of warrants outstanding and exercisable. + References No definition available. + Details
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