Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 7,679,267	$ 9,007,071
Prepaid expenses	251,046	267,711
Other current assets		7,997
Total current assets	7,930,313	9,282,779
Other assets	11,551	11,551
Total assets	7,941,864	9,294,330
Current Liabilities:
Accounts payable and accrued expenses	1,048,927	478,223
Accrued compensation	1,025,911	933,450
Total current liabilities	2,074,838	1,411,673
Warrant liability	3,701,277	4,095,019
Total liabilities	5,776,115	5,506,692
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; authorized shares — 5,000,000 at December 31, 2017 and 2016; issued and outstanding shares — 0 at December 31, 2017 and 2016
Common stock, $0.0001 par value; authorized shares — 50,000,000 at December 31, 2017 and 2016; issued and outstanding shares — 15,413,610 and 12,350,360 at December 31, 2017 and 2016, respectively	1,541	1,235
Additional paid-in capital	73,202,863	62,595,546
Accumulated deficit	(71,038,655)	(58,809,143)
Total stockholders' equity	2,165,749	3,787,638
Total liabilities and stockholders' equity	$ 7,941,864	$ 9,294,330