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Note A - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Jan. 02, 2021 USD ($) | Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($) | Dec. 30, 2017 USD ($) | Feb. 09, 2021 USD ($) | Dec. 29, 2017 USD ($)
Number of Geographic Regions | 2 |  |  |  |  |
Number of Sub Geographical Regions | 3 |  |  |  |  |
Impairment (Reversal) on Notes Receivable | $ 0 | $ 0 | $ (658) |  |  |
Proceeds from Collection of Notes Receivable | 281 | 231 | 4,849 |  |  |
Goodwill, Impairment Loss | 0 | 0 | 0 |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 | 0 | 0 |  |  |
Equity Securities without Readily Determinable Fair Value, Price Adjustment, Cumulative Amount | 0 |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount | 0 |  |  |  |  |
Minimum Amount of Individual Claims Before Insurance Reimbursement | 150 |  |  |  |  |
Minimum Amount of Projected Aggregate Claims Before Insurance Reimbursement | 12,491 |  |  |  |  |
Self-insurance Expense | 11,798 | 11,846 | $ 10,869 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 72,971 |  |  |  |  |
Contract with Customer, Asset, after Allowance for Credit Loss, Total | $ 0 | $ 0 |  |  |  |
Product Return, First Time Order, Duration of Retrun (Day) | 30 days |  |  |  |  |
Product Return, First Time Order, Percentage Refunded | 100.00% |  |  |  |  |
Product Return, Percentage Refunded | 100.00% |  |  |  |  |
Product Return, Percentage of Net Sales | 0.70% | 0.70% | 0.70% |  |  |
Advertising Expense | $ 9,853 | $ 11,615 | $ 10,345 |  |  |
Research and Development Expense, Total | 10,633 | 10,259 | 10,242 |  |  |
Subsequent Event [Member] |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 150,000 |
Designated as Hedging Instrument [Member] |  |  |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net, Total | 0 | 0 |  |  |  |
Foreign Exchange Option [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |
Derivative, Notional Amount | 90,000 | 110,000 |  |  |  |
Derivative, Gain on Derivative | 846 | 276 |  |  |  |
Other Assets [Member] |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount | $ 20,000 |  |  |  |  |
Non-revolving Credit to a Former Supplier [Member] |  |  |  |  |  |
Impairment (Reversal) on Notes Receivable |  |  |  | $ 2,734 |  |
Impaired Financing Receivable, Unpaid Principal Balance, Including Accrued Unpaid Interest |  |  |  |  |  | $ 6,734
Proceeds from Collection of Notes Receivable |  |  | $ 4,800 |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Non-revolving Credit to a Former Supplier [Member] |  |  |  |  |  |
Notes Receivable, Basis Spread on Variable Rate | 4.00% |  |  |  |  |
Amounts Receivable from Credit Card Processors [Member] |  |  |  |  |  |
Cash Equivalents, at Carrying Value, Total | $ 15,424 | 12,619 |  |  |  |
Restricted Cash Deposits in China [Member] |  |  |  |  |  |
Restricted Cash and Cash Equivalents, Noncurrent, Total | 3,062 | 2,858 |  |  |  |
Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Nonfinancial Assets, Fair Value Disclosure | $ 0 | $ 0 |  |  |  |

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