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v3.20.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |
Net loss | $ (2,370,629) | $ (2,560,094)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 8,350 | 19,801
Stock-based compensation expense | 327,500 | 469,724
Changes in assets and liabilities: |  |
Grant funds and other receivables | 53,211 | (62,056)
Prepaid expenses and other current assets | (56,211) | 36,480
Accounts payable and accrued expenses | 639,282 | 553,119
Total adjustments | 972,132 | 1,017,068
Net cash used in operating activities | (1,398,497) | (1,543,026)
Cash flows from investing activities: |  |
Purchase of property and equipment | (7,606) |
Net cash used in investing activities | (7,606) |
Cash flows from financing activities: |  |
Net proceeds from sale of preferred stock | 1,440,000 | 1,190,000
Proceeds from issuance of notes payable |  | 300,000
Principal repayment of notes payable | (10,257) |
Net cash provided by financing activities | 1,429,743 | 1,490,000
Net increase (decrease) in cash and cash equivalents | 23,640 | (53,026)
Cash and cash equivalents at beginning of period | 259,701 | 312,727
Cash and cash equivalents at end of period | $ 283,341 | $ 259,701

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