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Income taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 03, 2024
Jan. 28, 2023
Reconciliation of unrecognized tax benefits, excluding interest and penalties    
Beginning balance $ 4,158 $ 3,389
Increase due to a prior year tax position 1,437 1,473
Decrease due to a prior year tax position (590) (704)
Decrease due to a prior year audit adjustment (945)  
Ending balance $ 4,060 $ 4,158