Retirement Plans - Supplemental Plan (Details) - USD ($)	Mar. 28, 2021	Mar. 29, 2020
Defined Benefit Plan
Plan type	us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember	us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember
Other long-term assets
Defined Benefit Plan
Cash surrender value of life insurance policy	$ 2,680,700	$ 2,523,500
Other long-term liabilities
Defined Benefit Plan
Net present value of benefit obligation	$ 809,400	$ 915,700