Fair value measurement - Outstanding Debt (Details) - Senior Notes - Level 2 $ in Millions	Feb. 03, 2024 USD ($)
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding debt	$ 147.7
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding debt	$ 146.3

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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+ Details