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Available-for-sale securities - Summary of Available-For-Sale Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 25, 2026	Jan. 26, 2025
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 0	$ 12,715
Amortized Cost	5,205	14,725
Gross Unrealized Gain/(Loss)	(5,205)	(2,010)
Other than temporary impairment	9,520
Convertible debt | Recurring
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	12,715
Decrease in convertible debt instruments	3,200
Other than temporary impairment	9,500
Convertible debt
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	12,715
Amortized Cost	5,205	14,725
Gross Unrealized Gain/(Loss)	$ (5,205)	$ (2,010)

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