Statements of Cash Flows (USD $)	12 Months Ended			83 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Operating activities
Net loss	$ (2,836,465)	$ (2,017,528)	$ (2,401,244)	$ (22,691,468)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	145,966	12,505	22,705	235,677
Non-cash interest	23,261	4,042	2,426	129,327
Change in fair value of purchase right liability				188,587
Change in fair value of warrant liability	82,000	(7,250)	(5,500)	54,264
Deferred rent expense	6,830			6,830
Change in operating assets and liabilities:
Prepaid expenses and other assets	(234,262)	39,459	76,353	(234,262)
Other assets	(555,505)			(555,505)
Accounts payable and accrued expenses	327,905	218,909	(587,848)	842,314
Net cash used in operating activities	(3,040,270)	(1,749,863)	(2,893,108)	(22,024,236)
Financing activities
Proceeds from convertible promissory note				250,000
Proceeds from bank line of credit and loan advances	2,000,000	1,000,000		5,500,000
Payment on bank line of credit			(277,779)	(2,500,000)
Proceeds from issuance of common stock, net	25,120,948			25,125,528
Proceeds from issuance of preferred stock and purchase rights, net				17,744,041
Proceeds from exercise of stock options				101,358
Net cash provided by (used in) financing activities	27,120,948	1,000,000	(277,779)	46,220,927
Net increase (decrease) in cash and cash equivalents	24,080,678	(749,863)	(3,170,887)	24,196,691
Cash and cash equivalents at beginning of period	116,013	865,876	4,036,763
Cash and cash equivalents at end of period	24,196,691	116,013	865,876	24,196,691
Supplemental disclosures of cash flow information
Interest paid	128,875	20,000	1,346	228,751
Non-cash financing activities
Conversion of convertible promissory note and accrued interest to Series A Convertible Preferred Stock				292,538
Issuance of Series A Convertible Preferred Stock warrants	49,000	24,250		108,486
Conversion of Series A Convertible Preferred Stock to common stock at the initial public offering	$ 18,225,166			$ 18,225,166