| Fair Value Measurements (Reconciliation of the Beginning and Ending Liability Balance) (Details) - USD ($) | 6 Months Ended | |
|---|---|---|
| Mar. 31, 2023 | Mar. 31, 2022 | |
| Fair Value Measurements [Abstract] | ||
| Beginning balance | $ 4,294,000 | $ 7,851,000 | 
| Change in fair value of derivative liabilities | (530,000) | 1,438,000 | 
| Ending balance | $ 3,764,000 | $ 9,289,000 | 
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- References No definition available. 
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- Definition Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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