Annual report pursuant to Section 13 and 15(d)

Borrowings - Additional Information (Details)

v3.19.1
Borrowings - Additional Information (Details) - USD ($)
 12 Months Ended
Nov. 15, 2016
Dec. 29, 2018
Line of Credit Facility [Line Items]    
Credit facility trigger amount $ 2,400,000  
Number of consecutive days excess availability is above required amount 45 days  
Outstanding letters of credit balance   $ 14,714,000
Capital leases payable   9,153,000
Accounts payable    
Line of Credit Facility [Line Items]    
Outstanding letters of credit balance   11,433,000
JPMorgan Chase Bank | Revolving Line of Credit Facility    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 30,000,000  
Revolving loan payable   $ 0
Unused capacity commitment fee percentage   0.25%
Credit facility trigger amount $ 3,600,000  
Consecutive business days below minimum excess availability 3 days  
Number of consecutive days excess availability is above required amount 60 days  
Limited security by foreign subsidiaries' capital stock percentage   65.00%
One-Month London Interbank Offered Rate (LIBOR) | JPMorgan Chase Bank | Revolving Line of Credit Facility    
Line of Credit Facility [Line Items]    
Applicable margin for LIBOR-based interest rate/ Applicable margin for Alternate base rate   1.25%
London Interbank Offered Rate (LIBOR) | JPMorgan Chase Bank | Revolving Line of Credit Facility    
Line of Credit Facility [Line Items]    
Interest rate   3.81%
LIBOR based interest rate, principal   $ 0
Base Rate | JPMorgan Chase Bank | Revolving Line of Credit Facility    
Line of Credit Facility [Line Items]    
Applicable margin for LIBOR-based interest rate/ Applicable margin for Alternate base rate   0.25%
Interest rate   5.25%
Prime based rate principal   $ 0