Annual report pursuant to Section 13 and 15(d)

Note A - Summary of Significant Accounting Policies (Details Textual)

v3.20.4
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