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Loss Per Share - Calculations of Net Loss Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Earnings Per Share And Equity [Abstract]    
Net Income (Loss) $ (57,850) $ (9,090)
Basic weighted average common shares outstanding 40,940 36,378
Diluted weighted average common shares outstanding 40,940 36,378
Net loss per share attributable to common shareholders    
Basic $ (1.41) $ (0.25)
Diluted $ (1.41) $ (0.25)