Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Summary of Changes in Fair Value of Warrant Liabilities Measured at Recurring Basis (Details)

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Fair Value Measurement - Summary of Changes in Fair Value of Warrant Liabilities Measured at Recurring Basis (Details)
9 Months Ended
Sep. 30, 2017
USD ($)
Fair Value Disclosures [Abstract]  
Derivative liabilities, beginning balance $ 1,583,103
Issuance of warrants 936,881
Change in fair value of derivative liability 24,108,022
Derivative liabilities, ending balance 26,628,006
Warrants payable, beginning balance 155,412
Accrual of other warrant obligations 8,616
Change in fair value of warrants payable 2,366,686
Warrants payable, ending balance $ 2,530,714