Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities:
Net loss	$ (4,259,546)	$ (10,358,097)
Adjustments to reconcile net loss to cash used in operating activities:
Amortization and depreciation	17,739	35,448
Non-cash lease expense	56,698	66,298
Share-based compensation	175,426	144,694
Issuance of common stock for milestone		5,000,000
Issuance of common stock for services		59,000
Amortization of deferred issuance costs associated with convertible debt	20,986
Gain on forgiveness of PPP loan	(421,584)
Change in operating assets and liabilities:
Contracts and grants receivable	86,094	684,048
Prepaid expenses and other current assets	76,879	434,877
Research and development incentives receivable	306,651	19,754
Operating lease liability	(56,698)	(67,004)
Accounts payable and accrued expenses	(838,749)	(136,035)
Accrued compensation	(808,043)	(221,513)
Total adjustments	(1,384,601)	6,019,567
Net cash used in operating activities	(5,644,147)	(4,338,530)
Investing activities:
Purchases of office furniture and equipment		(7,147)
Net cash used in investing activities		(7,147)
Financing activities:
Proceeds from issuance of common stock pursuant to FBR At Market Issuance Sales Agreement	16,490,329	9,459,949
Costs associated with FBR At Market Issuance Sales Agreement	(496,450)	(425,915)
Proceeds from the exercise of warrants	51	685,384
Costs associated with issuance of convertible debt	(45,512)
Proceeds from paycheck protection program		417,830
Principal repayment - financing lease	(4,048)	(3,664)
Net cash provided by financing activities	15,944,370	10,133,584
Effect of exchange rate on cash and cash equivalents	3,083	(40,310)
Net increase in cash and cash equivalents	10,303,306	5,747,597
Cash and cash equivalents at beginning of period	18,676,663	5,420,708
Cash and cash equivalents at end of period	28,979,969	11,168,305
Supplemental information:
Cash paid for state income taxes	7,382
Cash paid for interest	444,814
Cash paid for lease liabilities:
Operating lease	66,650	71,298
Financing lease	4,272	4,272
Non-cash activities:
Deferred issuance cost in accounts payable		85,657
Deferred issuance cost reclassified to additional-paid-in capital	$ 47,727	85,266
Issuance of stock options, cash exercise price received in December 2019		$ 1,882