Schedule II - Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Mar. 27, 2011
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	$ 998,800	$ 1,616,500	$ 1,516,600
Provision for bad debts	1,197,300	458,700	1,050,500
Write-offs and other adjustments	(921,400)	(1,076,400)	(950,600)
Balance, end of period	1,274,700	998,800	1,616,500
Inventory Reserve [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	3,268,900	4,183,200	3,461,700
Inventory reserve expense	2,581,200	3,494,800	4,759,000
Write-offs and other adjustments	(2,513,400)	(4,409,100)	(4,037,500)
Balance, end of period	$ 3,336,700	$ 3,268,900	$ 4,183,200