Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net loss	$ (13,247,681)	$ (2,836,465)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,102,087	145,966
Non-cash interest	59,982	23,261
Change in fair value of warrant liability		82,000
Deferred rent expense	5,483	6,830
Change in operating assets and liabilities:
Prepaid expenses and other assets	(287,503)	(234,262)
Other assets		(555,505)
Accounts payable and accrued expenses	866,560	327,905
Net cash used in operating activities	(11,501,072)	(3,040,270)
Financing activities
Proceeds from bank line of credit	4,500,000	2,000,000
Payment on bank line of credit	(3,000,000)
Costs paid in connection with loan origination	(82,685)
Proceeds from issuance of common stock, net	42,875	25,120,948
Net cash provided by financing activities	1,460,190	27,120,948
Net increase (decrease) in cash and cash equivalents	(10,040,882)	24,080,678
Cash and cash equivalents at beginning of period	24,196,691	116,013
Cash and cash equivalents at end of period	14,155,809	24,196,691
Supplemental disclosure of cash flow information
Interest paid	58,790	128,875
Non-cash financing activities
Issuance of Series A Convertible Preferred Stock warrants		49,000
Conversion of Series A Convertible Preferred Stock to common stock at the initial public offering		$ 18,225,166