| Note 7 - Income Taxes | 6 Months Ended | ||
|---|---|---|---|
| Jul. 01, 2018 | |||
| Notes to Financial Statements | |||
| Income Tax Disclosure [Text Block] | 
 During the  threemonths ended  July 1, 2018 and  July 2, 2017, the Company recorded current income tax expenses of $196and $168,respectively on minimum taxes and taxes on profits in certain foreign jurisdictions. For the threemonths ended  July 1, 2018 and  July 2, 2017, deferred tax expense of $38and deferred tax recovery of $14,respectively was recorded on temporary differences related to the Mexican operations. During the sixmonths ended  July 1, 2018 and  July 2, 2017, the Company recorded current income tax expenses of $306and $295,respectively on minimum taxes and taxes on profits in certain foreign jurisdictions. For the sixmonths ended  July 1, 2018 and  July 2, 2017 deferred tax recoveries of $46and $148,respectively was recorded on temporary differences related to the Mexican operations. In assessing the realization of deferred tax assets, management considers whether it is more likely than  notthat some portion or all of its U.S. deferred tax assets will notbe realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. Management considers the scheduled reversal of deferred tax liabilities, change of control limitations, projected future taxable income and tax planning strategies in making this assessment. Guidance under ASC 740,Income Taxes, (“ASC 740”) states that forming a conclusion that a valuation allowance is notneeded is difficult when there is negative evidence, such as cumulative losses in recent years in the jurisdictions to which the deferred tax assets relate. The U.S., Canadian and Asian jurisdictions continue to have a full valuation allowance recorded against the deferred tax assets. |