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ACQUISITIONS (Supplemental Unaudited Pro Forma Information) (Details) - L.J. Kushner & Associates, L.L.C. - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Business Acquisition [Line Items]
Revenues	$ 82,352	$ 72,028	$ 224,691	$ 213,475
Gross profit	24,667	20,004	65,430	59,106
Net income (loss)	$ 4,646	$ 2,584	$ 8,842	$ (601)
Income (Loss) per share:
Basic pro forma (in usd per share)	$ 0.45	$ 0.25	$ 0.85	$ (0.06)
Diluted pro forma (in usd per share)	$ 0.45	$ 0.25	$ 0.85	$ (0.06)

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Business Acquisition, Pro Forma Gross Profit

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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