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BUSINESS SEGMENTS (Reconciliation of Revenue and Operating Income) (Details) - USD ($)
 3 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Dec. 27, 2020
Segment Reporting Information [Line Items]      
Revenues $ 67,711,690 $ 74,067,429  
Depreciation 201,267 227,271  
Amortization 658,407 1,187,442  
Operating income 1,231,713 2,657,394  
Capital expenditures 547,637 1,049,673  
Total assets 136,859,950   $ 130,278,268
Operating Segments | Real Estate      
Segment Reporting Information [Line Items]      
Revenues 18,612,744 20,027,833  
Depreciation 54,990 55,340  
Operating income 2,452,441 3,039,274  
Capital expenditures 40,979 25,724  
Total assets 16,856,073   15,598,575
Operating Segments | Professional      
Segment Reporting Information [Line Items]      
Revenues 31,137,448 36,343,906  
Depreciation 98,809 99,432  
Amortization 600,008 1,180,834  
Operating income 1,493,276 1,839,783  
Capital expenditures 60,019 40,972  
Total assets 88,150,689   81,671,193
Operating Segments | Light Industrial      
Segment Reporting Information [Line Items]      
Revenues 17,961,498 17,695,690  
Depreciation 23,432 27,105  
Operating income 1,155,670 1,097,098  
Capital expenditures 7,326 0  
Total assets 14,191,038   16,122,052
Home office      
Segment Reporting Information [Line Items]      
Depreciation 24,036 45,394  
Amortization 58,399 6,608  
Capital expenditures 439,313 982,977  
Total assets 17,662,150   $ 16,886,448
Home office | Selling and Marketing Expense      
Segment Reporting Information [Line Items]      
Operating income (238,829) (92,662)  
Home office | General and Administrative Expense      
Segment Reporting Information [Line Items]      
Operating income $ (3,630,845) $ (3,226,099)