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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Cash Flows used in Operating Activities      
Net loss $ (47,505) $ (47,978) $ (37,909)
Adjustments to reconcile net loss to net cash used in operations:      
Non-cash financing related charges 845
Stock-based compensation 16,370 18,379 8,231
Changes in working capital balances related to operations:      
Incentive and tax receivables 484 5,944 (4,287)
Prepaid expenses and deposits (299) 1 88
Accounts payable 497 (914) 751
Accrued liabilities 1,350 330 2,298
Deferred grant income 473 444
Net cash used in operating activities (27,785) (24,238) (30,384)
Cash Flows provided by Financing Activities      
Issuance of common shares 27,875 20,985 153,219
Share issue costs (707) (5,551)
Proceeds from exercise of warrants 1,467
Proceeds from exercise of stock options 1,776 1,010 4,108
Net cash provided by financing activities 29,651 21,288 153,243
Increase in cash and cash equivalents during the period 1,866 (2,950) 122,859
Cash and cash equivalents, beginning of period 149,158 152,108 29,249
Cash and cash equivalents, end of period 151,024 149,158 152,108
Supplemental Cash Flow Information      
Cash paid for state and local minimum income taxes $ 136 $ 327 $ 140