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Note 7 - Acquisitions (Details Textual)				3 Months Ended						9 Months Ended
	Feb. 25, 2021	Mar. 16, 2020 USD ($)	Jan. 29, 2020 USD ($)	Jun. 27, 2021 USD ($)	Mar. 28, 2021 USD ($)	Dec. 27, 2020 USD ($)	Jun. 28, 2020 USD ($)	Mar. 29, 2020 USD ($)	Dec. 29, 2019 USD ($)	Jun. 27, 2021 USD ($)	Jun. 28, 2020 USD ($)
Number of Real Estate Properties		68
Operating Lease, Annual Rent Payable		$ 8,000,000
Operating Lease, Percentage of Net Sales Proceeds		8.00%
Net Income (Loss) Attributable to Parent, Total				$ 3,227,000	$ (1,134,000)	$ 15,902,000	$ (1,275,000)	$ (5,367,000)	$ 5,320,000	$ 17,995,000	$ (1,320,000)
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	10
BHMG [Member]
Payments to Acquire Businesses, Gross		$ 140,000,000	$ 140,000,000
BHMG [Member] | Acquisition-related Costs [Member]
Net Income (Loss) Attributable to Parent, Total											$ 8,900,000

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