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Organization and principal accounting policies - Additional information (Details)
$ in Millions
3 Months Ended
Mar. 29, 2021
USD ($)
May 01, 2021
USD ($)
segment
May 02, 2020
USD ($)
Business Acquisition [Line Items]      
Number of reportable segments (segment) | segment   3  
Acquisition of Rocksbox Inc., net of cash acquired   $ 14.4 $ 0.0
Rocksbox      
Business Acquisition [Line Items]      
Acquisition of Rocksbox Inc., net of cash acquired $ 14.4    
Acquisition and integration related costs   $ 1.1  
Minimum      
Business Acquisition [Line Items]      
Seasonal revenues, fourth quarter sales, percent   35.00%  
Maximum      
Business Acquisition [Line Items]      
Seasonal revenues, fourth quarter sales, percent   40.00%