Annual report pursuant to Section 13 and 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) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Fair Value Disclosures [Abstract]    
Derivative liabilities, beginning balance $ 1,350,881 $ 3,635,294
Issuance of warrants 957,115 501,259
Change in classification 281,403
Change in fair value of derivative liability (724,893) (3,067,075)
Derivative liabilities, ending balance 1,583,103 1,350,881
Warrants payable, beginning balance 77,761 63,533
Provision for new warrant issuances 6,059
Accrual of other warrant obligations 81,603 221,709
Change in fair value of warrants payable (3,952) (201,621)
Issuance of warrants (11,919)
Warrants payable, ending balance $ 155,412 $ 77,761