LEASE COMMITMENTS (Details Textual)	12 Months Ended
	Dec. 30, 2017 USD ($) ft²	Dec. 31, 2016 USD ($)
Operating Leased Assets [Line Items]
Lease expiration date	May 14, 2022
Rent expense, net	$ 1,922,000	$ 1,872,000
Subtenant rent	$ 328,000	0
Area under operating lease | ft²	4,823
Disposal obligation	$ 158,000	185,000
Other accrued liabilities	128,000	103,000
Other noncurrent liabilities	30,000	82,000
Cost of Services [Member]
Operating Leased Assets [Line Items]
Rent expense, net	138,000	61,000
Selling, General and Administrative Expenses [Member]
Operating Leased Assets [Line Items]
Rent expense, net	$ 1,784,000	$ 1,811,000