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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Cash flows from operating activities:    
Net loss $ (1,780,036) $ (1,925,749)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 5,693 14,881
Stock-based compensation expense 290,744 275,425
Changes in assets and liabilities:    
Grant funds and other receivables 18,329 45,001
Prepaid expenses and other current assets (83,637) 62,544
Accounts payable and accrued expenses 431,170 486,413
Total adjustments 662,299 884,264
Net cash used in operating activities (1,117,737) (1,041,485)
Cash flows from investing activities:    
Purchase of property and equipment (4,272)
Net cash used in investing activities (4,272)
Cash flows from financing activities:    
Net proceeds from sale of preferred stock 1,440,000 1,190,000
Proceeds from issuance of note payable 50,000
Principal repayment of note payable (8,333)
Net cash provided by financing activities 1,431,667 1,240,000
Net increase in cash and cash equivalents 309,658 198,515
Cash and cash equivalents at beginning of period 259,701 312,727
Cash and cash equivalents at end of period $ 569,359 $ 511,242