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Inventories - Textuals (Details) - USD ($)
$ in Millions
Jul. 31, 2021
Jan. 31, 2021
Jul. 31, 2020
Inventory [Line Items]      
Inventory held on consignment $ 4.7 $ 3.5 $ 6.3
Prepaid Expenses and Other Current Assets      
Inventory [Line Items]      
Inventory return asset $ 11.2 $ 22.5 $ 15.1