Summary of Significant Accounting Policies - FY, Allowance for Doubtful Accounts and Inventory (Details) - USD ($)	12 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 31, 2019
Fiscal Year
Fiscal year duration	364 days	364 days	364 days
Allowance for Doubtful Accounts
Payment period from large majority of commercial customers	30 days
Allowance for doubtful accounts	$ 1,584,200	$ 3,288,800
Product Inventory
Reserves for excess or obsolescence inventory	3,359,000	9,666,100
Current portion of assets held for sale, reserve for excess and obsolete inventory	$ 81,000	$ 6,350,800
Minimum
Fiscal Year
Fiscal year duration	364 days
Maximum
Fiscal Year
Fiscal year duration	371 days