Quarterly report pursuant to Section 13 or 15(d)

Debt (Credit Agreement Interest Expense) (Details)

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Debt (Credit Agreement Interest Expense) (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Debt [Abstract]        
Amortization of credit agreement and residual royalty agreement discounts $ 317,747   $ 317,747  
Accretion of residual royalty agreement liability 27,278   27,278  
Amortization of deferred issuance costs 5,570   5,570  
Interest expense $ 350,595 $ 350,595