Statements of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2013	$ 21,183,261	$ 610	$ 43,874,119	$ (22,691,468)
Beginning Balance, Shares at Dec. 31, 2013		6,096,752
Stock-based compensation expense	1,102,087		1,102,087
Issuance of common stock upon exercise of warrant, Shares		2,795
Issuance of common stock upon exercise of stock option	1,522		1,522
Issuance of common stock upon exercise of stock option, Shares		5,250
Issuance of common stock from employee stock purchase plan	$ 41,353	$ 1	41,352
Issuance of common stock from employee stock purchase plan, Shares	7,294	7,294
Fair market value of issued warrant	$ 108,122		108,122
Net loss	(13,247,681)			(13,247,681)
Ending Balance at Dec. 31, 2014	$ 9,188,664	$ 611	45,127,202	(35,939,149)
Ending Balance, Shares at Dec. 31, 2014	6,112,091	6,112,091
Stock-based compensation expense	$ 1,504,356		1,504,356
Issuance of common stock from At-The-Market offering, net	4,723,572	$ 105	4,723,467
Issuance of common stock from At-The-Market offering, shares net		1,048,507
Issuance of common stock from employee stock purchase plan	$ 169,800	$ 4	169,796
Issuance of common stock from employee stock purchase plan, Shares	41,176	41,176
Net loss	$ (12,121,463)			(12,121,463)
Ending Balance at Dec. 31, 2015	$ 3,464,929	$ 720	$ 51,524,821	$ (48,060,612)
Ending Balance, Shares at Dec. 31, 2015	7,201,774	7,201,774