Note D - Income Taxes - Effective Tax Rate Reconciliation (Details)	12 Months Ended
Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Statutory U.S. federal income tax rate	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit	0.40%	0.30%	0.30%
Permanent tax differences	0.10%	0.20%	0.00%
Excess foreign tax credits	(10.90%)	(9.90%)	(13.00%)
Net increase in valuation allowance	10.60%	8.20%	11.70%
Foreign income tax rate differences	1.80%	1.70%	4.30%
Foreign withholding taxes	7.90%	7.70%	8.60%
Uncertain tax position reserve	(0.30%)	0.80%	0.40%
All other, net	1.10%	(0.10%)	(0.10%)
Effective Income Tax Rate Reconciliation, Percent, Total	31.70%	29.90%	33.20%

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
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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 attributable to changes in the valuation allowance for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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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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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 state and local income tax expense (benefit), net of federal tax expense (benefit).

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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 attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to permanent tax differences.

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