Investments (Amortized cost and fair value) (Details) - USD ($) $ in Thousands	Jul. 02, 2022	Apr. 02, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 17,930	$ 18,270
Fair Value	17,278	17,760
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,574	1,668
Fair Value	1,504	1,613
State and political subdivision debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,480	10,100
Fair Value	7,232	9,906
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,876	6,502
Fair Value	$ 8,542	$ 6,241