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ACQUISITIONS (Supplemental Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Income per share:
Effective income tax rate reconciliation, percent	31.90%	22.80%
L.J. Kushner & Associates, L.L.C.
Business Acquisition [Line Items]
Revenues	$ 77,176	$ 79,890
Gross profit	21,184	22,590
Net income	$ 1,277	$ 3,041
Income per share:
Basic pro forma (in usd per share)	$ 0.12	$ 0.30
Diluted pro forma (in usd per share)	$ 0.12	$ 0.29
Pro Forma
Income per share:
Effective income tax rate reconciliation, percent	31.90%	24.50%
Pro Forma | Revolving Credit Facility
Income per share:
Line of credit facility, interest rate during period	3.41%

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