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Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jul. 31, 2024 | Jul. 31, 2023 | Jul. 31, 2024 | Jul. 31, 2023
Research and Development Expense [Member] |  |  |  |
Non-cash stock-based compensation expenses | $ 462 | $ 520 | $ 1,471 | $ 1,517
General and Administrative Expense [Member] |  |  |  |
Non-cash stock-based compensation expenses | $ 717 | $ 697 | $ 2,228 | $ 1,990

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