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BASIS OF PRESENTATION AND CRITICAL ACCOUNTING POLICIES (Details) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 20, 2020 USD ($)	Mar. 02, 2020 $ / shares	Nov. 26, 2019 $ / shares	Jun. 27, 2020 USD ($)	Jun. 29, 2019 USD ($) $ / shares	Jun. 27, 2020 USD ($) segment $ / shares	Jun. 29, 2019 USD ($) $ / shares	Sep. 28, 2019 USD ($)	Sep. 29, 2019 USD ($)
Business And Summary Of Significant Accounting Policies [Line Items]
Deferred aggregate principal payments	$ 675
Deferred dividend payment (in USD per share) \| $ / shares		$ 0.25	$ 0.25		$ 0.25	$ 0.50	$ 0.75
Impairment charge				$ 364
Revenues				7,199	$ 44,807	$ 84,716	$ 120,667
Unearned revenue				3,753		3,753		$ 4,549
Right-of-use asset				55,984		55,984		$ 0	$ 62,330
Lease liabilities				57,809		$ 57,809			$ 63,943
Restaurants and Bars
Business And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments \| segment						20
Fast Food Concepts and Catering Operations
Business And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments \| segment						17
Catering Services
Business And Summary Of Significant Accounting Policies [Line Items]
Revenues				$ 25	$ 3,840	$ 7,259	$ 11,322
Three Vendors
Business And Summary Of Significant Accounting Policies [Line Items]
Concentration risk				46.00%
Three Hotel Operators \| Accounts Receivable
Business And Summary Of Significant Accounting Policies [Line Items]
Concentration risk						82.00%
One Hotel Operator \| Accounts Receivable
Business And Summary Of Significant Accounting Policies [Line Items]
Concentration risk								34.00%
Paycheck Protection Program Loan
Business And Summary Of Significant Accounting Policies [Line Items]
Paycheck Protection Program loan				$ 14,995		$ 14,995
COVID-19
Business And Summary Of Significant Accounting Policies [Line Items]
Restaurant management personnel furloughed						95.00%
Salary restoration, restaurant management						70.00%
Salary restoration for sustained profitability restaurants						100.00%
Salary restoration for corporate staff						65.00%
Deferred aggregate principal payments	$ 675
COVID-19 \| Minimum
Business And Summary Of Significant Accounting Policies [Line Items]
Length of restaurant temporary closure						1 day
Temporary salary reduction, corporate and administrative staff						50.00%
Temporary salary reduction, senior management						75.00%
COVID-19 \| Maximum
Business And Summary Of Significant Accounting Policies [Line Items]
Length of restaurant temporary closure						5 days
Temporary salary reduction, corporate and administrative staff						75.00%
Temporary salary reduction, senior management						95.00%
COVID-19 \| Paycheck Protection Program Loan
Business And Summary Of Significant Accounting Policies [Line Items]
Paycheck Protection Program loan				$ 15,000		$ 15,000