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v3.23.3

Consolidated Statements of Cash Flows (Unaudited) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Cash flows from operating activities |  |
Net loss | $ (4,723,663) | $ (7,588,833)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation expense | 946,262 | 1,408,210
Amortization of held-to-maturity securities, net | (47,516) | 37,094
Gain from the sale of investment in Alphazyme | (1,017,592) | 0
Foreign currency exchange loss (gain), net | 38,143 | 23,579
Changes in operating assets and liabilities: |  |
Interest receivable | 48,463 | 50,502
Accounts receivable | (107,666) | (14,837)
Prepaid expenses and other current assets | (91,537) | (70,051)
Operating lease assets and liabilities | (4,946) | 0
Accounts payable | (691,471) | (716,964)
Accrued expenses | 7,347 | 278,331
Deferred research and development obligation | (132,353) | 293,897
Deferred license revenue | (26,846) | (102,941)
Net cash used in operating activities | (5,803,375) | (6,402,013)
Cash flows from investing activities |  |
Purchases of held-to-maturity investment securities | (2,251,018) | (8,487,198)
Proceeds from maturities of investment securities | 8,373,000 | 5,500,000
Proceeds from the sale of investment in Alphazyme | 1,293,760 | 0
Net cash provided by (used in) investing activities | 7,415,742 | (2,987,198)
Cash flows from financing activities |  |
Proceeds from exercise of options | 0 | 402,091
Net cash provided by financing activities | 0 | 402,091
Effect of exchange rate changes on cash | (3,463) | (22,243)
Net increase (decrease) in cash and cash equivalents | 1,608,904 | (9,009,363)
Cash and cash equivalents at beginning of period | 5,794,272 | 15,748,480
Cash and cash equivalents at end of period | 7,403,176 | 6,739,117
Supplemental cash flow information |  |
Vesting of restricted stock units | 342,186 | 0
Right-of-use asset obtained in exchange for lease obligations | $ 156,983 | $ 0

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