Debt (Credit Agreement Interest Expense) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Debt [Abstract]
Amortization of Credit Agreement and Residual Royalty Agreement discounts	$ 922,144	$ 1,255,062	$ 3,187,972	$ 1,572,809
Accretion of Residual Royalty Agreement liability	147,223	94,858	363,520	122,136
Amortization of deferred issuance costs	21,909	30,202	76,479	35,772
Interest expense	$ 1,091,276	$ 1,380,122	$ 3,627,971	$ 1,730,717