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Note 6 - Long-Term Debt (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
May 17, 2019
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Payments of Debt Issuance Costs   $ (0) $ 2,086 $ (0)
Gain (Loss) on Extinguishment of Debt, Total   (0) (2,235) (0)
Repayments of Long-term Debt, Total   $ 26,250 321,408 $ 43,759
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member]        
Debt Instrument, Term (Year) 5 years      
Line of Credit Facility, Maximum Borrowing Capacity $ 75,000      
Proceeds from Issuance of Debt 31,500      
Repayments of Debt 204,400      
Payments of Debt Issuance Costs $ 2,100      
Gain (Loss) on Extinguishment of Debt, Total     $ 2,200  
Debt Instrument, Interest Rate, Effective Percentage   1.40%    
Line of Credit Facility, Commitment Fee Percentage   0.20%    
Proceeds from Lines of Credit, Total   $ 50,000    
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate 0.25%      
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.00%      
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.00%      
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.25%      
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.00%      
Credit Agreement, May 17, 2019 [Member] | Revolving Credit Facility [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]        
Debt Instrument, Basis Spread on Variable Rate 0.50%      
Credit Agreement, May 17, 2019 [Member] | Secured Term Loan [Member]        
Debt Instrument, Face Amount $ 175,000      
Debt Instrument, Interest Rate, Effective Percentage   1.61%    
Repayments of Long-term Debt, Total   $ 26,300    
Repayments of Long Term Debt, Accelerated Principal Payments   13,100    
Credit Agreement, May 17, 2019 [Member] | Secured Term Loan [Member] | Revolving Credit Facility [Member]        
Proceeds from Issuance of Debt $ 175,000      
Debt Instrument, Periodic Payment, Total   $ 4,400