Pension - Net benefit income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 31, 2021	Oct. 29, 2022	Oct. 30, 2021
Pension
Expected return on plan assets	$ 31		$ 63
Interest cost	(15)	$ (17)	(30)
Actuarial gain	72	241	6
Net periodic benefit cost	$ 88	$ 224	$ 39