BUSINESS SEGMENTS (Reconciliation of Revenue and Operating Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Sep. 25, 2022	Oct. 01, 2023	Sep. 25, 2022	Jan. 01, 2023
Segment Reporting Information [Line Items]
Revenues	$ 83,484	$ 78,508	$ 239,600	$ 221,139
Depreciation	106	151	343	463
Amortization	1,927	994	5,386	2,503
Operating income	5,267	6,469	(10,412)	13,523
Capital expenditures	529	1,149	2,019	4,680
Total assets	183,674		183,674		$ 194,673
Impairment losses	0	0	(22,545)	0
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Revenues	35,976	33,241	95,453	89,137
Depreciation	33	49	101	144
Operating income	7,212	6,148	17,676	15,000
Capital expenditures	10	46	64	100
Total assets	33,047		33,047		29,302
Operating Segments | Professional
Segment Reporting Information [Line Items]
Revenues	47,508	45,267	144,147	132,002
Depreciation	62	86	204	271
Amortization	1,638	542	4,550	1,643
Operating income	3,253	5,172	9,666	12,458
Capital expenditures	161	33	393	83
Total assets	125,730		125,730		141,018
Home office
Segment Reporting Information [Line Items]
Depreciation	11	16	38	48
Amortization	289	452	836	860
Capital expenditures	358	1,070	1,562	4,497
Total assets	24,897		24,897		$ 24,353
Home office | General and Administrative Expense
Segment Reporting Information [Line Items]
Operating income	$ (5,198)	$ (4,851)	$ (15,209)	$ (13,935)