Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Tax year being audited in the income tax examination, in CCYY format.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Tax Adjustments, Settlements, and Unusual Provisions		$ 1,200
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		1,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 198
Effective Income Tax Rate Reconciliation, Percent		920.40%	46.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		34.00%	34.00%
Income Tax Expense (Benefit)		$ (2,255)	$ 1,544
Effective Income Tax Rate Reconciliation, Tax Credit, Amount		603
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount		458	186
Effective Income Tax Rate Reconciliation, Deduction, Amount		2,861
Foreign Income Tax Expense (Benefit), Continuing Operations		(369)
Income Tax Examination, Penalties and Interest Expense		0	$ 0
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Puerto Rico Department of Treasury [Member]
Income Tax Expense (Benefit)		$ (248)
Foreign Tax Authority [Member] \| Canada Revenue Agency [Member]
Effective Income Tax Rate Reconciliation, Percent		26.50%
Foreign Tax Authority [Member] \| Ministry of Finance, Republic of Serbia [Member] \| Minimum [Member]
Effective Income Tax Rate Reconciliation, Percent		15.00%
Foreign Tax Authority [Member] \| Ministry of Finance, Republic of Serbia [Member] \| Maximum [Member]
Effective Income Tax Rate Reconciliation, Percent		20.00%
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Tax Year 2011 [Member]
Income Tax Examination, Year under Examination		2011
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Tax Year 2012 [Member]
Income Tax Examination, Year under Examination		2012
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Tax Year 2013 [Member]
Income Tax Examination, Year under Examination		2013
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Tax Year 2015 [Member]
Income Tax Examination, Year under Examination		2015
State and Local Jurisdiction [Member] \| New Jersey Division of Taxation [Member] \| Earliest Tax Year [Member]
Income Tax Examination, Year under Examination		2009
State and Local Jurisdiction [Member] \| New Jersey Division of Taxation [Member] \| Latest Tax Year [Member]
Income Tax Examination, Year under Examination		2012