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Borrowings and Finance Lease Obligations (Details) - USD ($)
12 Months Ended
Feb. 16, 2016
Jan. 30, 2021
Aug. 01, 2020
May 02, 2020
Feb. 01, 2020
Borrowings and finance lease obligations          
Term loans   $ 56,765,000     $ 0
Finance lease obligations   22,063,000     16,535,000
Mortgage debt   18,507,000     19,132,000
Borrowings under credit facilities   7,332,000     3,957,000
Other   2,597,000     2,636,000
Less current installments   38,710,000     9,490,000
Long-term debt and finance lease obligations   68,554,000     32,770,000
Mortgage Debt          
Debt issuance costs   0      
Europe | Foreign line of credit          
Borrowings and finance lease obligations          
Borrowings under credit facilities   0      
Credit Facilities          
Letters of credit outstanding   0      
Remaining borrowing capacity under credit facilities   $ 148,400,000      
Europe | Foreign line of credit | Minimum          
Term Loans          
Interest rate (as a percent)   0.70%      
Europe | Foreign line of credit | Maximum          
Term Loans          
Interest rate (as a percent)   1.30%      
China | Foreign line of credit          
Borrowings and finance lease obligations          
Borrowings under credit facilities   $ 7,300,000     4,000,000.0
Credit Facilities          
Maximum borrowing capacity     $ 30,000,000.0 $ 20,000,000.0  
Cash flow hedges | Interest rate swap | Derivatives designated as hedging instruments          
Mortgage Debt          
Fixed rate of interest rate swap derivative (as a percent)   3.06%      
Long-term debt and finance lease liabilities, excluding convertible senior notes          
Borrowings and finance lease obligations          
Total debt and finance lease obligations   $ 107,264,000     42,260,000
Less current installments   38,710,000     9,490,000
Long-term debt and finance lease obligations   68,554,000     32,770,000
Mortgage Debt          
Debt issuance costs   55,000      
Unsecured Debt | Europe          
Borrowings and finance lease obligations          
Term loans   $ 56,800,000      
Unsecured Debt | Europe | Minimum          
Term Loans          
Debt maturity period (in years)   1 year      
Interest rate (as a percent)   0.50%      
Unsecured Debt | Europe | Maximum          
Term Loans          
Debt maturity period (in years)   5 years      
Interest rate (as a percent)   1.50%      
Period for renewal   5 years      
Finance lease obligation | Equipment | Netherlands          
Borrowings and finance lease obligations          
Finance lease obligations   $ 18,400,000     12,600,000
Finance Lease Obligations          
Effective interest rate   6.00%      
Finance lease obligation | Computer hardware and software          
Borrowings and finance lease obligations          
Finance lease obligations   $ 3,700,000     4,000,000.0
Mortgage debt | Building | U.S.          
Borrowings and finance lease obligations          
Mortgage debt $ 21,500,000 18,500,000     19,100,000
Term Loans          
Debt maturity period (in years) 10 years        
Mortgage Debt          
Debt amortization period (in years) 25 years        
Debt issuance costs   100,000     100,000
Mortgage debt | Building | U.S. | LIBOR          
Mortgage Debt          
Interest rate margin (as a percent) 1.50%        
Mortgage debt | Building | U.S. | Interest rate swap          
Mortgage Debt          
Fair value of cash flow hedge interest rate swap liability   1,000,000.0     $ 300,000
Mortgage debt | Building | Cash flow hedges | U.S. | Interest rate swap | Derivatives designated as hedging instruments          
Mortgage Debt          
Fixed rate of interest rate swap derivative (as a percent) 3.06%        
Credit Facility          
Borrowings and finance lease obligations          
Borrowings under credit facilities   $ 0      
Credit Facilities          
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   101,000,000      
Credit Facility | Accordion feature          
Credit Facilities          
Maximum borrowing capacity   $ 180,000,000      
Credit Facility | U.S. line of credit | Base rate | Minimum          
Mortgage Debt          
Interest rate margin (as a percent)   0.75%      
Credit Facility | U.S. line of credit | Base rate | Maximum          
Mortgage Debt          
Interest rate margin (as a percent)   1.25%      
Credit Facility | U.S. line of credit | LIBOR          
Credit Facilities          
Debt instrument, minimum rate   1.00%      
Interest rate margin added to respective base rate   1.00%      
Credit Facility | U.S. line of credit | LIBOR | Minimum          
Mortgage Debt          
Interest rate margin (as a percent)   1.75%      
Credit Facility | U.S. line of credit | LIBOR | Maximum          
Mortgage Debt          
Interest rate margin (as a percent)   2.25%      
Credit Facility | U.S. line of credit | Federal funds rate          
Credit Facilities          
Interest rate margin added to respective base rate   0.50%      
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 | Canada | Foreign line of credit          
Credit Facilities          
Maximum borrowing capacity   $ 20,000,000      
Credit Facility | Canada | Foreign line of credit | Prime rate          
Credit Facilities          
Debt instrument, minimum rate   0.00%      
Credit Facility | Canada | Foreign line of credit | Prime rate | Minimum          
Mortgage Debt          
Interest rate margin (as a percent)   0.75%      
Credit Facility | Canada | Foreign line of credit | Prime rate | Maximum          
Mortgage Debt          
Interest rate margin (as a percent)   1.25%      
Credit Facility | Canada | Foreign line of credit | Canadian BA rate          
Credit Facilities          
Debt instrument, minimum rate   1.00%      
Interest rate margin added to respective base rate   1.00%      
Credit Facility | Canada | Foreign line of credit | Canadian BA rate | Minimum          
Mortgage Debt          
Interest rate margin (as a percent)   1.75%      
Credit Facility | Canada | Foreign line of credit | Canadian BA rate | Maximum          
Mortgage Debt          
Interest rate margin (as a percent)   2.25%