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Fair Value Measurements (Reconciliation of the Beginning and Ending Liability Balance) (Details) - USD ($)
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Fair Value Measurements [Abstract]    
Beginning balance $ 3,625,000 $ 2,426,000
Change in fair value of derivative liabilities 557,000 1,199,000
Ending balance $ 4,182,000 $ 3,625,000