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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Cash Flows from operating activities:    
Net loss $ (59,979) $ (50,431)
Adjustments to reconcile net loss to net cash used in operating activities    
Non-cash interest expense 319 427
Loss on extinguishment of debt 488  
Loss on impairment of assets 147  
Non-cash lease expense 489 102
Accretion of marketable securities (1,085) (1,977)
Unrealized foreign currency losses 40 21
Share-based compensation expense 6,948 4,459
Depreciation of property and equipment 369 208
Changes in operating assets and liabilities:    
Investment tax credit receivable 104 (200)
Prepaid expenses and other assets (4,004) (1,353)
Accounts payable (4,895) 152
Accrued expenses and other current liabilities 1,901 37
Lease liabilities (243) (88)
Net cash used in operating activities (59,401) (48,643)
Cash flows from investing activities    
Purchases of property and equipment (251) (344)
Purchases of marketable securities (219,401) (108,423)
Proceeds from maturities of marketable securities 116,993 41,750
Net cash used in investing activities (102,659) (67,017)
Cash flows from financing activities    
Proceeds from Second Amended Term Loan 25,000  
Repayment of Amended Term Loan principal (23,053)  
Payment of issuance costs associated with Second Amended Term Loan (545)  
Proceeds from issuance of pre-funded warrants 23,250  
Proceeds from public offering 126,250  
Payment of issuance cost associated with public offering and pre-funded warrants (9,448)  
Proceeds from exercise of stock options 280 200
Net cash provided by financing activities 141,734 200
Effect of exchange rate changes on cash and cash equivalents 1 1
Net decrease in cash and cash equivalents (20,325) (115,459)
Cash and cash equivalents at beginning of period 50,152 173,004
Cash and cash equivalents at end of period 29,827 57,545
Supplemental cash flow information:    
Cash paid for interest 1,000 $ 1,046
Warrant value issued as part of Second Amended Term Loan $ 415