SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
	Dec. 30, 2018 USD ($) Supplier	Dec. 31, 2017 USD ($)	Jan. 01, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Percentage of total operating expenses	27.00%	25.00%	18.00%
Write-off of equipment	$ 5,000	$ 12,000	$ 368,000
Deferred Cost	0
Valuation allowances and reserves	156,000		93,000
Operating loss carryforward	55,000,000
Valuation allowance	$ 54,913,000	55,931,000
Number of suppliers | Supplier	1
ASU 2016-02
Finite-Lived Intangible Assets [Line Items]
Right-of-use assets for operating leases	$ 683,000
Lease liabilities for operating leases	749,000
Selling, General and Administrative Expenses
Finite-Lived Intangible Assets [Line Items]
Costs related to advertising and promotion expenditures	$ 93,000	$ 95,000	$ 51,000
Licensed Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (up to)	5 years
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year
Minimum | Assets Held under Capital Leases
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years
Maximum | Assets Held under Capital Leases
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years