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ACQUISITIONS (Supplemental Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
(Loss) Income per share:
Effective income tax rate reconciliation, percent	25.90%	22.80%	22.80%	22.80%
L.J. Kushner & Associates, L.L.C.
Business Acquisition [Line Items]
Revenues	$ 62,606	$ 84,653	$ 139,782	$ 164,543
Gross profit	16,905	24,733	38,089	47,323
Net (loss) income	$ (4,829)	$ 4,297	$ (3,544)	$ 7,334
(Loss) Income per share:
Basic pro forma (in usd per share)	$ (0.47)	$ 0.42	$ (0.34)	$ 0.72
Diluted pro forma (in usd per share)	$ (0.47)	$ 0.41	$ (0.34)	$ 0.71
Pro Forma
(Loss) Income per share:
Effective income tax rate reconciliation, percent	25.90%
Pro Forma | Revolving Credit Facility
(Loss) Income per share:
Line of credit facility, interest rate during period			3.70%

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