ACQUISITIONS (Details Textual) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Sep. 18, 2017	Apr. 03, 2017	Jul. 01, 2018	Jul. 01, 2018
Zycron, Inc.
Business Acquisition [Line Items]
Initial cash paid for acquisition		$ 18,500
Stock issued during period, value, acquisitions		1,000
Escrow deposit		500
Contingent consideration		$ 3,000
Business combination, period of contingency		2 years
Business combination, period for true-up of acquired working capital		120 days
Revenues			$ 71,487	$ 8,700
Net income			$ 2,310	$ 700
Smart, Inc.
Business Acquisition [Line Items]
Initial cash paid for acquisition	$ 6,000
Contingent consideration	$ 2,000
Business combination, period of contingency	2 years
Business combination, period for true-up of acquired working capital	90 days
Private Placement | Zycron, Inc.
Business Acquisition [Line Items]
Stock issued during period, shares, acquisitions		70,670