INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 984,744	$ 921,461	$ 3,211,849	$ 2,795,585
Amortization of intangible assets	1,064,230	992,480	3,476,416	3,024,381
Total expense	1,083,053	1,011,970	3,532,882	3,068,763
Client partner lists
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	918,349	881,525	3,009,370	2,671,149
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	66,395	39,936	202,479	124,436
Amortization Expense \| Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	79,486	71,019	264,567	228,796
Selling, General and Administrative Expenses \| Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 18,823	$ 19,490	$ 56,466	$ 44,382