Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Reconciliation of the Beginning and Ending Liability Balance) (Details)

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Fair Value Measurements (Reconciliation of the Beginning and Ending Liability Balance) (Details) - USD ($)
6 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Fair Value Measurements [Abstract]    
Beginning balance $ 4,182,000 $ 3,625,000
Change in fair value of derivative liabilities 657,000 (75,000)
Ending balance $ 4,839,000 $ 3,550,000