INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	$ 610,207	$ 1,106,800	$ 1,210,149	$ 2,227,105
Amortization of intangible assets	693,091	1,224,745	1,351,498	2,412,187
Total expense	711,913	1,243,567	1,389,142	2,449,831
Client partner lists
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	554,962	1,040,405	1,100,289	2,091,021
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	55,245	66,395	109,860	136,084
Amortization Expense \| Computer Software, Intangible Asset
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	82,884	117,945	141,349	185,082
Selling, General and Administrative Expenses \| Computer Software, Intangible Asset
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 18,822	$ 18,822	$ 37,644	$ 37,644