Quarterly report pursuant to Section 13 or 15(d)

Deerfield Obligation - Schedule of Debt (Details)

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Deerfield Obligation - Schedule of Debt (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Debt discount $ 0 $ 0
Deerfield Obligation, net of debt discount 15,377,754 0
Long-term debt— current portion 787,500 0
Long term debt, net of current portion and debt discount 14,590,254 0
Deerfield Obligation    
Debt Instrument [Line Items]    
Deerfield Obligation $ 15,377,754 $ 0