Fair Value of Financial Instruments - Fair Value Measurement Inputs (Details) |
Sep. 30, 2020 |
Sep. 30, 2019 |
---|---|---|
Expected volatility | ||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
Fair value, measurement input | 0.937 | 0.750 |
Risk-free interest rate | ||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
Fair value, measurement input | 0.004 | 0.022 |
Expected dividend yield | ||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
Fair value, measurement input | 0 | 0 |
Expected term (years) | ||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
Fair value, measurement input | 4.9 | 6.9 |