Investments (Amortized cost and fair value) (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Apr. 03, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 17,155	$ 14,823
Fair Value	17,101	14,946
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,165	2,787
Fair Value	2,157	2,804
State and political subdivision debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,521	7,239
Fair Value	7,538	7,345
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,469	4,797
Fair Value	$ 7,406	$ 4,797