Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net loss	$ (19,872,715)	$ (8,845,667)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,596,693	620,918
Amortization of debt discount		73,965
Amortization of debt issuance costs		7,757
Non-cash interest expense		542,397
Change in fair value of warrant and embedded derivative liabilities		(260,237)
Loss on extinguishment of debt		2,444,516
Depreciation	10,733	2,291
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	129,519	(218,464)
Other assets	(32,500)	(23,000)
Accounts payable	1,975,221	(14,134)
Accrued expenses	2,128,420	481,521
Net cash used in operating activities	(14,064,629)	(5,188,137)
Cash flows from investing activities
Purchases of equipment	(98,506)	(16,083)
Net cash used in investing activities	(98,506)	(16,083)
Cash flows from financing activities
Proceeds from issuance of convertible notes		7,382,468
Debt issuance costs		(12,489)
Deferred financing fees		(121,238)
Proceeds from exercise of options	14,679
Payment of loan from related party		(41,469)
Net cash provided by financing activities	14,679	7,207,272
Net increase in cash	(14,148,456)	2,003,052
Cash at beginning of period	48,036,260	2,617,815
Cash at end of period	$ 33,887,804	4,620,867
Supplemental disclosures of non-cash financing activity:
Deferred financing fees		$ 971,672