Debt (Credit Agreement Interest Expense) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Debt [Abstract]
Amortization of discounts	$ 844,592	$ 1,107,622	$ 1,706,578	$ 2,265,828
Accretion of residual royalty agreement	300,519	123,946	559,697	216,297
Amortization of deferred issuance costs	19,851	26,704	40,112	54,570
Interest expense	$ 1,164,962	$ 1,258,272	$ 2,306,387	$ 2,536,695