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v3.19.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities: |  |  |
Net loss | $ (2,560,094) | $ (2,170,162) | $ (3,271,701)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 19,801 | 28,027 | 28,780
Stock-based compensation expense | 469,724 | 57,224 | 967,667
Changes in assets and liabilities: |  |  |
Grant funds and other receivables | (62,056) | (31,684) | 91,904
Prepaid expenses and other current assets | 36,480 | (13,314) | (5,626)
Accounts payable and accrued expenses | 553,119 | 441,445 | 242,857
Total adjustments | 1,017,068 | 481,698 | 1,325,582
Net cash used in operating activities | (1,543,026) | (1,688,464) | (1,946,119)
Cash flows from investing activities: |  |  |
Purchase of property and equipment |  | (4,350) |
Net cash used in investing activities |  | (4,350) |
Cash flows from financing activities: |  |  |
Net proceeds from sale of preferred stock | 1,190,000 | 980,000 |
Net proceeds from sale of common stock |  | 571,511 | 1,339,801
Proceeds from issuance of notes payable | 300,000 |  |
Net cash provided by financing activities | 1,490,000 | 1,551,511 | 1,339,801
Net decrease in cash and cash equivalents | (53,026) | (141,303) | (606,318)
Cash and cash equivalents at beginning of period | 312,727 | 454,030 | 1,060,348
Cash and cash equivalents at end of period | $ 259,701 | $ 312,727 | $ 454,030

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