Available-for-sale securities - Summary Of Investments (Details) - USD ($) $ in Thousands	Apr. 26, 2026	Jan. 25, 2026
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 0	$ 0
Amortized Cost	4,519	5,205
Gross Unrealized Loss	(4,519)	(5,205)
Convertible debt
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
Amortized Cost	4,519	5,205
Gross Unrealized Loss	$ (4,519)	$ (5,205)