Statements of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2014	$ 9,188,664	$ 611	$ 45,127,202	$ (35,939,149)
Beginning Balance, Shares at Dec. 31, 2014		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
Stock-based compensation expense	$ 1,706,524		1,706,524
Issuance of common stock from At-The-Market offering, net	256,113	$ 6	256,107
Issuance of common stock from At-The-Market offering, shares net		56,000
Issuance of common stock from employee stock purchase plan	$ 98,742	$ 3	98,739
Issuance of common stock from employee stock purchase plan, Shares	34,067	34,067
Issuance of common stock from warrant exercise		$ 1	(1)
Issuance of common stock from warrant exercise, Shares		9,887
Issuance of common stock and warrants, net	$ 8,803,036	$ 505	8,802,531
Issuance of common stock and warrants, shares net		5,048,632
Reclassification of warrant liability due to warrant amendment	206,825		206,825
Net loss	(10,748,531)			(10,748,531)
Ending Balance at Dec. 31, 2016	$ 3,787,638	$ 1,235	$ 62,595,546	$ (58,809,143)
Ending Balance, Shares at Dec. 31, 2016	12,350,360	12,350,360