Condensed Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 74,996,609	$ 88,067,647
Prepaid expenses and other current assets	917,065	986,680
Total current assets	75,913,674	89,054,327
Property and equipment, net	552,757	3,423,880
Other assets	142,870	142,870
Total assets	76,609,301	92,621,077
Current liabilities:
Accounts payable	2,957,284	4,369,133
Accrued expenses	8,472,881	5,422,205
Short term debt	20,900,000	3,075,421
Total current liabilities	32,330,165	12,866,759
Noncurrent liability:
Long term debt	0	17,382,907
STOCKHOLDERS' EQUITY
Preferred stock, 5,000,000 shares authorized at March 31, 2018 and December 31, 2017, 0 outstanding	0	0
Common stock, $0.00033 par value, 75,000,000 shares authorized at March 31, 2018 and December 31, 2017, 31,246,231 shares and 30,869,205 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	10,524	10,400
Additional paid-in capital	217,057,074	214,309,370
Accumulated deficit	(172,788,462)	(151,948,359)
Total stockholders' equity	44,279,136	62,371,411
Total liabilities and stockholders' equity	$ 76,609,301	$ 92,621,077