Balance Sheets - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 8,044,199	$ 7,585,392
Prepaid expenses and other	1,836,770	447,136
Total current assets	9,880,969	8,032,528
Fixed assets, net	5,036,406	5,997,582
Right-of-use asset	1,045,339	0
Total assets	15,962,714	14,030,110
Current liabilities
Accounts payable and accrued expenses	2,129,736	1,324,651
Lease liability-current portion	253,079	59,579
Total current liabilities	2,382,815	1,384,230
Lease liability-long-term	1,276,685	476,753
Warrant derivative liability	8,165,955	6,933,031
Total liabilities	11,825,455	8,794,014
Commitments and contingencies (Note 7)
Stockholders’ equity
Preferred Stock, par value $0.0001; 10,000,000 shares authorized; none issued
Common Stock, par value $0.0001; 200,000,000 shares authorized; shares issued and outstanding - 142,207,862 as of September 30, 2019 and 110,941,516 as of December 31, 2018	14,221	11,094
Additional paid-in capital	187,735,629	176,227,510
Accumulated deficit	(183,612,591)	(171,002,508)
Total stockholders’ equity	4,137,259	5,236,096
Total liabilities and stockholders’ equity	$ 15,962,714	$ 14,030,110