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Note 15 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 04, 2020	Sep. 29, 2019	Oct. 04, 2020	Sep. 29, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	21.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent			30.00%	30.00%
Income Tax Expense (Benefit), Total	$ (3,239,000)	$ 32,000	$ (3,103,000)	$ 148,000
Foreign Tax Authority [Member] | Mexican Tax Authority [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ (3,257,000)
Income Tax Expense (Benefit), Total			$ (3,257,000)

X

- Definition

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

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Percentage 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 applicable to statutory income tax expense (benefit) outside of the country of domicile.

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

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