| Credit Agreement |  
		
			
				| 
						 | 
						  | 
						  | 
						  | 
						  | 
						  |  
				| 
						 | 
						December 31, 2018
 | 
						  | 
						September 30, 2018
 |  
				| 
						 | 
						  | 
						  | 
						  | 
						  | 
						  |  
				| 
						Aggregate repayment obligation | 
						$ | 17,500,000 | 
						  | 
						$ | 17,500,000 |  
				| 
						Less: Payments | 
						  | (3,201,762) | 
						  | 
						  | (642,485) |  
				| 
						Less: Unamortized discounts  | 
						  | (7,320,088) | 
						  | 
						  | (8,475,874) |  
				| 
						Less: Unamortized deferred issuance costs  | 
						  | (176,487) | 
						  | 
						  | (204,353) |  
				| 
						Credit agreement, net | 
						  | 6,801,663 | 
						  | 
						  | 8,177,288 |  
				| 
						Add: Embedded derivative liability at fair value (see Note 3) | 
						  | 1,138,000 | 
						  | 
						  | 1,217,000 |  
				| 
						 | 
						  | 7,939,663 | 
						  | 
						  | 9,394,288 |  
				| 
						Credit agreement, short-term portion | 
						  | (4,943,543) | 
						  | 
						  | (6,692,718) |  
				| 
						Credit agreement, long-term portion  | 
						$ | 2,996,120 | 
						  | 
						$ | 2,701,570 |  
				| 
						 | 
						  | 
						  | 
						  | 
						  | 
						  | 
			
		   | 
| Residual Royalty Agreement Liability |  
		
			
				| 
						 | 
						  | 
						  | 
						  | 
						  | 
						  |  
				| 
						 | 
						December 31,2018
 | 
						  | 
						September 30,2018
 |  
				| 
						 | 
						  | 
						  | 
						  | 
						  | 
						  |  
				| 
						Residual Royalty Agreement liability, fair value at inception | 
						$ | 346,000 | 
						  | 
						$ | 346,000 |  
				| 
						Less: Unamortized discounts | 
						  | 
						  — | 
						  | 
						  | (2,420) |  
				| 
						Add: Accretion of liability using effective interest rate | 
						  | 293,576 | 
						  | 
						  | 201,225 |  
				| 
						Residual Royalty Agreement liability, net | 
						  | 639,576 | 
						  | 
						  | 544,805 |  
				| 
						Add: Embedded derivative liability at fair value (see Note 3) | 
						  | 1,063,000 | 
						  | 
						  | 1,209,000 |  
				| 
						Residual Royalty Agreement liability | 
						$ | 1,702,576 | 
						  | 
						$ | 1,753,805 |  
				| 
						 | 
						  | 
						  | 
						  | 
						  | 
						  | 
			
		   | 
| Credit Agreement Interest Expense |  
		
			
				| 
						 | 
						  | 
						  |  
				| 
						 | 
						Three Months EndedDecember 31, 2018
 |  
				| 
						 | 
						  | 
						  |  
				| 
						Amortization of Credit Agreement and Residual Royalty Agreement discounts | 
						$ | 1,158,206 |  
				| 
						Accretion of Residual Royalty Agreement liability | 
						  | 92,351 |  
				| 
						Amortization of deferred issuance costs | 
						  | 27,866 |  
				| 
						 | 
						$ | 1,278,423 | 
			
		   |