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Business Segments - Segment Activity (Details)	3 Months Ended
Business Segments - Segment Activity (Details)	Jun. 26, 2022 USD ($) segment item	Jun. 27, 2021 USD ($)	Mar. 27, 2022 USD ($)
Segments
Number of reportable segments \| segment	2
Market unit activity
Revenues	$ 112,161,200	$ 104,956,100
Gross Profit	22,363,400	19,686,200
Assets	$ 212,017,700		$ 202,513,300
Minimum
Segments
Number manufacturers of products for which the Company is a distributor. \| item	300
Corporate
Market unit activity
Assets	$ 133,353,000		127,012,000
Carrier Segment
Market unit activity
Revenues	47,065,000	46,020,000
Gross Profit	6,265,000	5,322,000
Carrier Segment \| Segments
Market unit activity
Assets	39,534,000		38,705,000
Commercial Segment
Market unit activity
Revenues	65,096,000	58,936,000
Gross Profit	16,098,000	$ 14,364,000
Commercial Segment \| Segments
Market unit activity
Assets	$ 39,131,000		$ 36,797,000