Stockholders' Equity - Fair value of advisory warrants (Details) |
Sep. 30, 2021
Y
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Sep. 30, 2020
Y
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|---|---|---|
| Remaining contractual term (years) | ||
| Class of Stock [Line Items] | ||
| Warrants and Rights Outstanding, Measurement Input | 3.0 | 3.0 |
| Common stock price volatility | ||
| Class of Stock [Line Items] | ||
| Warrants and Rights Outstanding, Measurement Input | 83.9 | 86.4 |
| Risk-free interest rate | ||
| Class of Stock [Line Items] | ||
| Warrants and Rights Outstanding, Measurement Input | 0.5 | 0.2 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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