CLOSURES AND IMPAIRMENTS EXPENSE (Details) (USD $)	3 Months Ended
	Sep. 04, 2012	Aug. 30, 2011
Impairment Expense [Abstract]
Property impairments	$ 448,000	$ 206,000
Closed restaurant lease reserves	478,000	79,000
Other closing costs	289,000	190,000
(Gain)/loss on sale of surplus properties	(91,000)	(30,000)
Total closure and impairments expenses	1,124,000	445,000
Closed Location Lease Obligation [Roll Forward]
Beginning balance	6,813,000
Closing expense including rent and other lease charges	478,000
Payments	(792,000)
Transfer of deferred escalating minimum rent balance	348,000
Other adjustments	(5,000)
Ending balance	6,842,000
Lease obligation charge of closed restaurant, Subleased	200,000
Number of sites subleased	3
Amount required under the terms of sublease	800,000
Restaurants open more than one year with rolling 12-month negative cash flows [Abstract]
Restaurants open more than a year with negative cash flows	26
Negative cash flows rolling months period	12 months
Negative cash flow restaurants impaired at salvage value	15
Negative cash flow restaurants not recorded at salvage value	11
Negative cash flow restaurants not recorded at salvage value, remaining net book value.	$ 8,600,000