v3.26.1
Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net (Income) Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 28, 2025
Jun. 30, 2026
Jun. 28, 2025
Numerator:        
Net loss $ (25,711) $ (38,019) $ (50,981) $ (117,520)
Less: net loss attributable to non-controlling interest 17,487 0 34,680 0
Net loss attributable to common shareholders $ (8,224) $ (38,019) $ (16,301) $ (117,520)
Denominator:        
Weighted-average common shares outstanding - basic (in shares) 32,758,090 0 31,055,542 0
Net loss per share - basic (in usd per share) $ (0.25) $ 0 $ (0.52) $ 0
Net loss per share - diluted (in usd per share) $ (0.25) $ 0 $ (0.52) $ 0