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BUSINESS SEGMENTS (Reconciliation of Revenue and Operating Income) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jul. 02, 2023
Jun. 30, 2024
Jul. 02, 2023
Dec. 31, 2023
Segment Reporting Information [Line Items]          
Revenues $ 68,137 $ 80,800 $ 136,903 $ 156,116  
Depreciation 90 111 184 238  
Amortization 1,891 1,829 3,804 3,458  
Operating income 81 5,050 497 (15,679)  
Capital expenditures 501 745 995 1,490  
Total assets 159,754   159,754   $ 178,517
Impairment losses 0 0 0 (22,545)  
Operating Segments | Real Estate          
Segment Reporting Information [Line Items]          
Revenues 25,726 31,071 50,273 59,477  
Depreciation 31 33 63 68  
Operating income 3,203 5,774 6,605 10,464  
Capital expenditures 7 21 20 53  
Total assets 22,811   22,811   29,884
Operating Segments | Professional          
Segment Reporting Information [Line Items]          
Revenues 42,411 49,729 86,630 96,639  
Depreciation 49 67 101 143  
Amortization 1,600 1,549 3,216 2,911  
Operating income 1,556 3,786 3,230 6,413  
Capital expenditures 69 184 132 232  
Total assets 112,517   112,517   122,751
Home office          
Segment Reporting Information [Line Items]          
Depreciation 10 11 20 27  
Amortization 291 280 588 547  
Capital expenditures 425 540 843 1,205  
Total assets 24,426   24,426   $ 25,882
Home office | General and Administrative Expense          
Segment Reporting Information [Line Items]          
Operating income $ (4,678) $ (4,510) $ (9,338) $ (10,011)