EARNINGS PER SHARE (EPS) (Details) - USD ($)	3 Months Ended
Mar. 31, 2017	Apr. 01, 2016
Earnings per share
Net income	$ 2,641,000	$ 1,078,000
Weighted-average common shares outstanding (in shares)	8,281,000	7,996,000
Effect of dilutive stock options and restricted stock awards (in shares)	573,000	248,000
Weighted-average common shares outstanding-diluted (in shares)	8,854,000	8,244,000
Earnings per share:
Basic (in dollars per share)	$ 0.32	$ 0.13
Diluted (in dollars per share)	$ 0.30	$ 0.13
Stock options
Anti-dilutive securities excluded from the computation of earnings per share
Number of awards excluded from calculation of dilutive potential common shares (in shares)	10,000	516,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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