Credit Facilities And Long-Term Debt (Schedule Of Long-term Debt Instruments) (Details) - USD ($)	12 Months Ended
	May 28, 2016	May 30, 2015
Debt Instrument [Line Items]
Total debt	$ 25,570,000	$ 50,860,000
Less: current maturities	16,320,000	10,065,000
Long-term debt, less current maturities	9,250,000	40,795,000
Note payable at 6.20% [Member]
Debt Instrument [Line Items]
Total debt	$ 10,500,000	13,500,000
Interest rate	6.20%
Principal installment	$ 250,000
Maturity year	2019
Note payable at 6.35% [Member]
Debt Instrument [Line Items]
Total debt	$ 9,100,000	10,300,000
Interest rate	6.35%
Principal installment	$ 100,000
Maturity year	2017
Note payable at 5.40% [Member]
Debt Instrument [Line Items]
Total debt	$ 3,250,000	4,750,000
Interest rate	5.40%
Principal installment	$ 125,000
Maturity year	2018
Note payable at 6.40% [Member]
Debt Instrument [Line Items]
Total debt	$ 2,720,000	3,140,000
Interest rate	6.40%
Principal installment	$ 35,000
Maturity year	2017
Note payable at 5.99% [Member]
Debt Instrument [Line Items]
Total debt		12,700,000
Interest rate	5.99%
Principal installment	$ 150,000
Series A Senior Secured Notes at 5.45% [Member]
Debt Instrument [Line Items]
Total debt		6,311,000
Interest rate	5.45%
Principal installment	$ 175,500
Note payable at 2.00% [Member]
Debt Instrument [Line Items]
Total debt		$ 159,000
Interest rate	2.00%
Principal installment	$ 20,790