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Borrowings and Capital Lease Obligations (Details)
3 Months Ended 12 Months Ended
Feb. 16, 2016
USD ($)
Jun. 23, 2015
USD ($)
May 05, 2018
USD ($)
facility
Feb. 03, 2018
USD ($)
Borrowings and capital lease obligations        
Mortgage debt, maturing monthly through January 2026     $ 20,178,000 $ 20,323,000
Capital lease obligations     17,551,000 18,589,000
Other     2,851,000 3,129,000
Total debt and capital lease obligations     40,580,000 42,041,000
Less current installments     3,363,000 2,845,000
Long-term debt and capital lease obligations     37,217,000 39,196,000
Mortgage Debt        
Mortgage debt, maturing monthly through January 2026     20,178,000 20,323,000
Capital Lease        
Capital lease obligations     $ 17,551,000 18,589,000
Interest rate swap | Derivatives designated as hedging instruments | Cash flow hedges        
Borrowings and capital lease obligations        
Fixed rate of interest rate swap derivative (as a percent)     3.06%  
Europe | Foreign line of credit        
Credit Facilities        
Current borrowing capacity     $ 66,600,000  
Credit Facility, outstanding amount     $ 0  
Number of credit facilities subject to minimum net equity requirement | facility     1  
Maximum borrowing capacity of the credit facility which is subject to a minimum net equity requirement     $ 41,900,000  
Europe | Foreign line of credit | Minimum        
Credit Facilities        
Interest rate (as a percent)     0.50%  
Europe | Foreign line of credit | Maximum        
Credit Facilities        
Interest rate (as a percent)     4.60%  
Europe | Documentary letters of credit | Foreign line of credit        
Credit Facilities        
Letters of credit outstanding     $ 0  
Mortgage debt | Building | U.S.        
Borrowings and capital lease obligations        
Mortgage debt, maturing monthly through January 2026 $ 21,500,000.0   20,178,000 20,323,000
Mortgage Debt        
Debt maturity period (in years) 10 years      
Mortgage debt, maturing monthly through January 2026 $ 21,500,000.0   20,178,000 20,323,000
Debt amortization period (in years) 25 years      
Debt issuance costs     $ 100,000 100,000
Mortgage debt | Building | U.S. | LIBOR        
Borrowings and capital lease obligations        
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 asset     $ 1,522,000 1,460,000
Mortgage debt | Building | U.S. | Interest rate swap | Derivatives designated as hedging instruments | Cash flow hedges        
Borrowings and capital lease obligations        
Fixed rate of interest rate swap derivative (as a percent) 3.06%   3.06%  
Capital lease | Equipment | Netherlands        
Borrowings and capital lease obligations        
Capital lease obligations     $ 16,300,000 17,300,000
Capital Lease        
Capital lease obligations incurred       $ 17,000,000
Effective interest rate on capital lease obligations     6.00% 6.00%
Capital lease obligations     $ 16,300,000 $ 17,300,000
Capital lease | Computer hardware and software        
Borrowings and capital lease obligations        
Capital lease obligations     1,300,000 1,300,000
Capital Lease        
Capital lease obligations     1,300,000 $ 1,300,000
Credit Facility        
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        
Mortgage Debt        
Debt maturity period (in years)   5 years    
Credit Facilities        
Maximum borrowing capacity   $ 150,000,000 $ 150,000,000  
Current borrowing capacity     97,000,000  
Credit Facility | Accordion feature        
Credit Facilities        
Maximum borrowing capacity   150,000,000 $ 150,000,000  
Credit Facility | U.S. line of credit | Base rate | Minimum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     0.25%  
Credit Facility | U.S. line of credit | Base rate | Maximum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     0.75%  
Credit Facility | U.S. line of credit | LIBOR        
Credit Facilities        
Interest rate margin added to respective base rate     1.00%  
Credit Facility | U.S. line of credit | LIBOR | Minimum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     1.25%  
Credit Facility | U.S. line of credit | LIBOR | Maximum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     1.75%  
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     $ 1,000,000  
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   $ 50,000,000 $ 50,000,000  
Credit Facility | Canada | Foreign line of credit | Prime rate | Minimum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     0.25%  
Credit Facility | Canada | Foreign line of credit | Prime rate | Maximum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     0.75%  
Credit Facility | Canada | Foreign line of credit | Canadian BA rate        
Credit Facilities        
Interest rate margin added to respective base rate     1.00%  
Credit Facility | Canada | Foreign line of credit | Canadian BA rate | Minimum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     1.25%  
Credit Facility | Canada | Foreign line of credit | Canadian BA rate | Maximum        
Borrowings and capital lease obligations        
Interest rate margin (as a percent)     1.75%  
Credit Facility | Canada | Foreign line of credit | Bank of Canada overnight rate        
Credit Facilities        
Interest rate margin added to respective base rate     0.50%