SUBSEQUENT EVENTS (Details)					1 Months Ended		3 Months Ended	9 Months Ended		87 Months Ended	91 Months Ended
	Aug. 03, 2020 USD ($)	May 14, 2020 USD ($) store	May 12, 2020 USD ($)	May 06, 2020 USD ($)	May 31, 2020 USD ($)	Nov. 30, 2018 USD ($)	Oct. 27, 2018 USD ($)	Apr. 25, 2020 USD ($)	Apr. 27, 2019 USD ($)	Jan. 25, 2020 USD ($)	May 31, 2020 USD ($)
Subsequent Event [Line Items]
Payment for acquisition, net of cash acquired								$ (64,000)	$ 0
Insurance recoveries						$ 415,000	$ 415,000			$ 3,998,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Insurance recoveries					$ 2,266,000						$ 6,264,000
Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Line of Credit [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity				$ 150,500,000
Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity				125,000,000
Allowable convertible debt				50,000,000
Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Line of Credit [Member] | Medium-term Notes [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity				25,500,000
Proceeds from debt			$ 25,500,000
Debt term			7 years
Effective interest rate			1.76%
Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Line of Credit [Member] | Letter of Credit [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity				$ 25,000,000
Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Convertible Debt [Member]
Subsequent Event [Line Items]
Debt term				15 years
London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Debt, basis spread on variable rate				1.10%
London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Line of Credit [Member] | Medium-term Notes [Member]
Subsequent Event [Line Items]
Debt, basis spread on variable rate			1.35%
Derivative, fixed rate			0.41%
London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Convertible Debt [Member]
Subsequent Event [Line Items]
Debt, basis spread on variable rate				1.50%
Fairway Markets [Member]
Subsequent Event [Line Items]
Escrow deposit								$ 7,600,000
Fairway Markets [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of stores acquired | store		5
Payment for acquisition, net of cash acquired		$ 73,200,000
Acquisition credit		$ 2,000,000
Scenario, Forecast [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Convertible Debt [Member]
Subsequent Event [Line Items]
Effective interest rate	2.19%
Interest Rate Swap [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Convertible Debt [Member]
Subsequent Event [Line Items]
Derivative term	15 years
Interest Rate Swap [Member] | Scenario, Forecast [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Convertible Debt [Member]
Subsequent Event [Line Items]
Derivative, notional amount	$ 50,000,000
Interest Rate Swap [Member] | Scenario, Forecast [Member] | London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement with Wells Fargo National Bank, National Association [Member] | Subsequent Event [Member] | Convertible Debt [Member]
Subsequent Event [Line Items]
Derivative, fixed rate	0.69%