Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 36,816,128	$ 42,604,935
Prepaid research and development contracts		510,177
Other current assets	578,461	1,603,913
Total current assets	37,394,589	44,719,025
Furniture and equipment, net		121,730
Operating lease right-of-use assets, net	9,452	63,919
Deposits	20,000	20,000
Total assets	37,424,041	44,924,674
Current liabilities:
Accounts payable and accrued expenses	2,198,140	1,799,371
Current portion of operating lease liability	9,955	67,438
Total current liabilities	2,208,095	1,866,809
Total liabilities	2,208,095	1,866,809
Commitments and contingencies (Note 12)
Stockholders’ equity:
Common stock, $0.0001 par value per share; 300,000,000 shares authorized and 47,477,084 and 47,251,319 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively.	4,747	4,725
Additional paid-in capital	190,611,718	189,603,985
Accumulated deficit	(155,400,519)	(146,550,845)
Total stockholders’ equity	35,215,946	43,057,865
Total liabilities and stockholders’ equity	$ 37,424,041	$ 44,924,674

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.