Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 38,524,536	$ 62,614,010
Prepaid research and development contracts	311,154	754,392
Other current assets	734,785	615,681
Total current assets	39,570,475	63,984,083
Furniture and equipment, net	164,187	98,449
Operating lease right-of-use assets, net	162,124
Deposits	40,000	40,960
Total assets	39,936,786	64,123,492
Current liabilities:
Accounts payable and accrued expenses	3,231,450	5,456,917
Current portion of operating lease liability	102,555
Total current liabilities	3,334,005	5,456,917
Operating lease liability, net of current portion	67,438
Total liabilities	3,401,443	5,456,917
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, $0.0001 par value per share; 300,000,000 shares authorized and 40,588,004 shares issued and outstanding at December 31, 2019 and 2018.	4,059	4,059
Additional paid-in capital	178,766,806	177,621,807
Accumulated deficit	(142,235,522)	(118,959,291)
Total stockholders’ equity	36,535,343	58,666,575
Total liabilities and stockholders’ equity	$ 39,936,786	$ 64,123,492