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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) | 3 Months Ended
--- | ---
Jul. 31, 2023 | Jul. 31, 2022
Cash flows from operating activities: |  |
Net loss | $ (3,183,297) | $ (1,545,012)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock issued for services | 0 | 2,278
Stock issued for compensation | 0 | 2,750
Stock-based compensation | 0 | 4,595
Warrant issuance costs | 913,640 | 0
Change in fair value of warrant liability | 1,452,000 | 0
Change in fair value of derivative liability | 530,000 | 0
Change in assets and liabilities: |  |
Decrease in prepaid expenses and other current assets | 19,031 | 66,024
Increase in accounts payable | 589,849 | 353,665
Increase in accrued expenses | 21,736 | 31,322
Net cash provided by (used in) operating activities | 342,959 | (1,084,378)
Cash flows from investing activities: |  |
Net cash provided by (used in) investing activities | 0 | 0
Cash flows from financing activities: |  |
Repurchase of common stock | (26,457,324) | (2,090,847)
Proceeds from issuance of preferred stock | 35,000,000 | 0
Payment for issuance costs related to preferred stock | (2,263,565) | 0
Proceeds from warrant exercise | 70 | 880
Net cash provided by (used in) financing activities | 6,279,181 | (2,089,967)
Effect of currency rate exchange on cash and cash equivalents | 451 | 1,304
Net increase (decrease) in cash and cash equivalents | 6,622,591 | (3,173,041)
Cash and cash equivalents at beginning of the period | 68,039,936 | 85,400,656
Cash and cash equivalents at end of the period | 74,662,527 | 82,227,615
Supplemental disclosure of cash flows information: |  |
Cash paid during the periods for income taxes | 1,600 | 0
Non-cash derivative liability at initial fair value | 2,770,000 | 0
Non-cash warrant liability at initial fair value | 14,127,000 | 0
Accrual of Series B Convertible Preferred Stock dividends | $ 319,849 | $ 0

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