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Consolidated Statements of Cash Flows (Unaudited) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net loss | $ (8,082,122) | $ (15,615,679)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation | 1,548,837 | 4,190,356
Non-cash interest expense | 58,152 | 87,160
Net amortization of premium on marketable securities | (171,859) | (14,542)
Depreciation and amortization expense | 60,632 | 66,972
Change in assets and liabilities: |  |
Prepaid expenses and other current assets | (2,821,279) | 3,733,114
Accounts payable | (1,057,758) | 296,060
Accrued expenses and other liabilities | 492,710 | (2,187,259)
Net cash used in operating activities | (9,972,687) | (9,443,818)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchases of marketable securities | (30,376,620) | 0
Sales and maturities of marketable securities | 0 | 30,000,000
Net cash used in investing activities | (30,376,620) | 30,000,000
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from employee stock purchase plan | 18,191 | 52,559
Net cash provided by financing activities | 18,191 | 52,559
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | (40,331,116) | 20,608,741
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD | 142,823,016 | 144,419,364
CASH AND CASH EQUIVALENTS, END OF PERIOD | 102,491,900 | 165,028,105
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: |  |
Cash paid during the period for interest | $ 439,833 | $ 397,396

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