Condensed Statements of Cash Flows (USD $)	9 Months Ended		80 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
Operating activities
Net loss	$ (1,219,767)	$ (1,345,078)	$ (21,074,770)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	13,881	9,378	103,592
Non-cash interest	17,446	2,021	123,512
Change in fair value of purchase right liability			188,587
Change in fair value of warrant liability	82,000	(4,550)	54,264
Changes in operating assets and liabilities:
Prepaid expenses and other assets		39,459
Accounts payable and accrued expenses	(44,562)	201,666	469,847
Net cash used in operating activities	(1,151,002)	(1,097,104)	(20,134,968)
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			(2,500,000)
Proceeds from issuance of common stock	25,200,000		25,204,580
Cash paid in connection with initial public offering	(2,426,958)		(2,426,958)
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 financing activities	24,773,042	1,000,000	43,873,021
Net change in cash and cash equivalents	23,622,040	(97,104)	23,738,053
Cash and cash equivalents at beginning of the period	116,013	865,876
Cash and cash equivalents at end of the period	23,738,053	768,772	23,738,053
Supplemental disclosures of cash flow information
Interest paid	94,750	4,750	194,626
Supplemental disclosures of noncash financing information
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