RETIREMENT BENEFIT PLANS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jun. 26, 2015	Jul. 01, 2016	Jun. 26, 2015
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	$ 14,000	$ 14,000	$ 29,000	$ 29,000
Expected return on plan assets	(16,000)	(17,000)	(32,000)	(33,000)
Amortization of net loss	10,000	12,000	20,000	24,000
Net periodic benefit cost	8,000	9,000	17,000	20,000
Entity's contributions towards pension plan			31,000
Expected future contributions in current fiscal year			30,000
Other Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	12,000	13,000	25,000	25,000
Amortization of net loss	5,000	9,000	10,000	17,000
Net periodic benefit cost	$ 17,000	$ 22,000	$ 35,000	$ 42,000