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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

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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