Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (USD $)	Total	Preferred Stock [Member] Series A Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Deficit Accumulated During the Development Stage [Member]
Beginning Balance at Jan. 29, 2007
Beginning Balance, shares at Jan. 29, 2007
Issuance of restricted common stock for cash	4,580		92	4,488
Issuance of restricted common stock for cash, shares			916,000
Issuance of Series A convertible preferred stock		6,074,501
Issuance of Series A convertible preferred stock, shares		4,195,067
Initial fair value of preferred stock purchase rights issued in connection with Series A financing		(848,257)
Estimated fair value of exercised purchase right		80,819
Issuance of common stock upon exercise of stock options	77,358		26	77,332
Issuance of common stock upon exercise of stock options, shares			266,750
Stock-based compensation expense	5,458			5,458
Net loss	(2,009,591)				(2,009,591)
Ending Balance at Dec. 31, 2007	(1,922,195)	5,307,063	118	87,278	(2,009,591)
Ending Balance, shares at Dec. 31, 2007		4,195,067	1,182,750
Issuance of Series A convertible preferred stock		5,998,145
Issuance of Series A convertible preferred stock, shares		4,000,000
Estimated fair value of exercised purchase right		956,025
Stock-based compensation expense	16,184			16,184
Net loss	(3,227,664)				(3,227,664)
Ending Balance at Dec. 31, 2008	(5,133,675)	12,261,233	118	103,462	(5,237,255)
Ending Balance, shares at Dec. 31, 2008		8,195,067	1,182,750
Stock-based compensation expense	17,803			17,803
Net loss	(5,159,638)				(5,159,638)
Ending Balance at Dec. 31, 2009	(10,275,510)	12,261,233	118	121,265	(10,396,893)
Beginning Balance, shares at Dec. 31, 2009		8,195,067	1,182,750
Issuance of Series A convertible preferred stock		5,963,933
Issuance of Series A convertible preferred stock, shares		4,000,001
Issuance of common stock upon exercise of stock options	24,000		6	23,994
Issuance of common stock upon exercise of stock options, shares			60,000
Stock-based compensation expense	15,056			15,056
Net loss	(5,039,338)				(5,039,338)
Ending Balance at Dec. 31, 2010	(15,275,792)	18,225,166	124	160,315	(15,436,231)
Ending Balance, shares at Dec. 31, 2010		12,195,068	1,242,750
Stock-based compensation expense	22,705			22,705
Net loss	(2,401,244)				(2,401,244)
Ending Balance at Dec. 31, 2011	(17,654,331)	18,225,166	124	183,020	(17,837,475)
Ending Balance, shares at Dec. 31, 2011		12,195,068	1,242,750
Stock-based compensation expense	12,505			12,505
Net loss	(2,017,528)				(2,017,528)
Ending Balance at Dec. 31, 2012	(19,659,354)	18,225,166	124	195,525	(19,855,003)
Beginning Balance, shares at Dec. 31, 2012		12,195,068	1,242,750
Issuance of common stock upon exercise of stock options, shares
Stock-based compensation expense	145,966			145,966
Conversion of shares of preferred stock to common stock	18,225,166	(18,225,166)	244	18,224,922
Conversion of shares of preferred stock to common stock, shares		(12,195,068)	2,439,002
Initial public offering of common stock	25,120,948		242	25,120,706
Initial public offering of common stock, shares			2,415,000
Reclassification of warrant liability	187,000			187,000
Net loss	(2,836,465)				(2,836,465)
Ending Balance at Dec. 31, 2013	$ 21,183,261		$ 610	$ 43,874,119	$ (22,691,468)
Ending Balance, shares at Dec. 31, 2013			6,096,752