Annual report pursuant to Section 13 and 15(d)

Debt (Credit Agreement Interest Expense) (Details)

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Debt (Credit Agreement Interest Expense) (Details) - USD ($)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Debt [Abstract]    
Amortization of Credit Agreement and Residual Royalty Agreement discounts $ 4,037,320 $ 2,686,706
Accretion of Residual Royalty Agreement liability 572,293 201,225
Amortization of deferred issuance costs 96,443 62,570
Interest expense $ 4,706,056 $ 2,950,501