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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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