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DEBT - Term Loan Agreement (Details)
$ in Thousands
9 Months Ended
Jun. 28, 2018
USD ($)
Sep. 29, 2018
USD ($)
Dec. 30, 2017
USD ($)
Debt      
Write off of unamortized deferred financing costs   $ 518  
Unamortized debt issuance costs   2,497 $ 1,127
Prior Credit Facility | Credit Facility      
Debt      
Write off of unamortized deferred financing costs   518  
Unamortized debt issuance costs   675  
Restated Bank of America Agreement | Credit Facility      
Debt      
Unamortized debt issuance costs   1,958  
Restated Bank of America Agreement | Credit Facility | Minimum      
Debt      
Fixed charge coverage ratio 1.0    
Term Loan Agreement      
Debt      
Face amount of loan $ 17,500    
Percentage of ownership interests of domestic subsidiaries pledged 100.00%    
Percentage of ownership interests of foreign subsidiaries pledged 65.00%    
Quarterly basis installment amount   $ 219  
Interest rate on borrowings   11.40%  
Amount outstanding   $ 17,500  
Term Loan Agreement | Minimum      
Debt      
Fixed charge coverage ratio 1.0    
Term Loan Agreement | LIBOR      
Debt      
Interest rate basis   LIBOR  
Applicable margin (as a percent)   9.00%