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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Cash Flows from Operating Activities: |  |
Net loss | $ (20,198,843) | $ (16,348,802)
Reconciliation of net loss to net cash used in operating activities: |  |
Depreciation and amortization | 272,725 | 70,908
Changes in fair value of warrant liabilities | (31,000) | 80,000
Stock-based compensation | 3,974,536 | 4,073,505
Amortization on right-of-use assets | 337,530 | 134,919
Changes in operating assets and liabilities: |  |
Prepaid expenses and deposits | (840,703) | (1,764,345)
Interest receivable | 56,054 | 30,032
Accounts payable and accrued expenses | 3,955,609 | 137,161
Lease liability | (166,723) | (136,812)
Net cash used in operating activities | (12,640,815) | (13,723,434)
Cash Flows from Investing Activities: |  |
Purchase of property and equipment | (2,484,825) | (362,121)
Purchase of construction in progress | (4,557,581) | 0
Net cash used in investing activities | (7,042,406) | (362,121)
Cash Flows from Financing Activities: |  |
Proceeds from Issuance of Common Stock | 2,186,009 |
Proceeds from exercise of stock options | 0 | 57,744
Proceeds from exercise of warrants | 550,000 | 758,733
Net cash provided by financing activities | 2,736,009 | 816,477
Net decrease in cash | (16,947,212) | (13,269,078)
Cash and cash equivalents at beginning of the period | 43,903,949 | 61,746,748
Cash and cash equivalents at end of the period | 26,956,737 | 48,477,670
Supplemental schedule of non-cash financing activities: |  |
Issuance of common stock as commitment fee for future financing | 345 | 0
Recognition of right-of-use assets and lease liability from new operating lease agreements | 11,077,636 | 0
Stock warrants cashless exercised | $ 0 | $ 4

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