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Borrowings and Finance Lease Obligations (Details) - USD ($)
3 Months Ended
Feb. 16, 2016
May 01, 2021
Jan. 30, 2021
Apr. 30, 2019
Feb. 03, 2018
Debt Instrument [Line Items]          
Term loans   $ 55,951,000 $ 56,765,000    
Finance lease obligations   22,421,000 22,063,000    
Mortgage debt   18,346,000 18,507,000    
Borrowings under credit facilities   5,097,000 7,332,000    
Other   2,826,000 2,597,000    
Less current installments   17,917,000 38,710,000    
Term Loans and Mortgage Debt          
Mortgage debt   18,346,000 18,507,000    
Finance Lease          
Finance lease obligations   22,421,000 22,063,000    
Credit Facilities          
Credit Facility, outstanding amount   5,097,000 7,332,000    
Europe | Foreign line of credit          
Debt Instrument [Line Items]          
Borrowings under credit facilities   0      
Credit Facilities          
Letters of credit outstanding   0      
Credit Facility, outstanding amount   0      
Remaining borrowing capacity   $ 113,500,000      
Europe | Foreign line of credit | Minimum          
Term Loans and Mortgage Debt          
Interest rate (as a percent)   1.05%      
Europe | Foreign line of credit | Maximum          
Term Loans and Mortgage Debt          
Interest rate (as a percent)   1.10%      
China | Foreign line of credit          
Debt Instrument [Line Items]          
Borrowings under credit facilities   $ 5,100,000 7,300,000    
Credit Facilities          
Maximum borrowing capacity   30,000,000      
Credit Facility, outstanding amount   5,100,000 7,300,000    
Long-term debt and finance lease liabilities, excluding convertible senior notes          
Debt Instrument [Line Items]          
Total debt and finance lease obligations   104,641,000 107,264,000    
Less current installments   17,917,000 38,710,000    
Long-term debt and finance lease obligations   86,724,000 68,554,000    
Term Loans | Europe          
Debt Instrument [Line Items]          
Term loans   $ 56,000,000.0      
Term Loans | Europe | Minimum          
Term Loans and Mortgage Debt          
Debt maturity period (in years)   1 year      
Interest rate (as a percent)   0.50%      
Term Loans | Europe | Maximum          
Term Loans and Mortgage Debt          
Debt maturity period (in years)   5 years      
Interest rate (as a percent)   2.20%      
Finance lease | Equipment | Europe          
Debt Instrument [Line Items]          
Finance lease obligations   $ 19,200,000 18,400,000    
Finance Lease          
Finance lease obligations   19,200,000 18,400,000    
Finance lease | Equipment | Netherlands          
Finance Lease          
Effective interest rate on finance lease obligations         6.00%
Finance lease | Computer hardware and software          
Debt Instrument [Line Items]          
Finance lease obligations   3,200,000 3,700,000    
Finance Lease          
Finance lease obligations   3,200,000 3,700,000    
Credit Facility          
Debt Instrument [Line Items]          
Borrowings under credit facilities   0      
Credit Facilities          
Credit Facility, outstanding amount   $ 0      
Percentage of borrowings exceeding borrowing base that require the Company to comply with a fixed charge coverage ratio on a trailing four-quarter basis   80.00%      
Credit Facility | Revolving Credit Facility          
Credit Facilities          
Maximum borrowing capacity     120,000,000    
Current borrowing capacity   $ 109,000,000      
Credit Facility | Standby letters of credit          
Credit Facilities          
Letters of credit outstanding   2,100,000      
Credit Facility | Documentary letters of credit          
Credit Facilities          
Letters of credit outstanding   0      
Credit Facility | Accordion feature          
Credit Facilities          
Maximum borrowing capacity   180,000,000      
Credit Facility | Canada | Foreign line of credit          
Credit Facilities          
Maximum borrowing capacity     20,000,000    
Mortgage debt | Building [Member] | U.S.          
Debt Instrument [Line Items]          
Mortgage debt $ 21,500,000        
Term Loans and Mortgage Debt          
Debt maturity period (in years) 10 years        
Mortgage debt $ 21,500,000        
Senior Notes | 2.00% Convertible Senior Notes Due 2024          
Term Loans and Mortgage Debt          
Interest rate (as a percent)       2.00%  
Debt issuance costs   $ 2,550,000 $ 2,763,000