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DISCONTINUED OPERATIONS - Financial Results of Instaff (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Dec. 26, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before gain on sale and income taxes	$ 0	$ 1,235,000	$ 4,570,000
Instaff | Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	16,465,000	71,292,000
Cost of services	14,144,000	60,948,000
Gross profit	2,321,000	10,344,000
Selling expenses	1,062,000	5,684,000
Depreciation	24,000	90,000
Income from discontinued operations before gain on sale and income taxes	$ 1,235,000	$ 4,570,000

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