Investments (Amortized cost and fair value) (Details) - USD ($) $ in Thousands	Jul. 01, 2023	Apr. 01, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 18,123	$ 19,335
Fair Value	17,292	18,555
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,328	2,567
Fair Value	2,237	2,488
State and political subdivision debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,172	6,023
Fair Value	4,910	5,769
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,623	10,745
Fair Value	$ 10,145	$ 10,298