Annual report pursuant to Section 13 and 15(d)

Credit Facilities (Details Textual)

v3.10.0.1
Credit Facilities (Details Textual)
₩ in Thousands
12 Months Ended
Apr. 05, 2018
USD ($)
Dec. 29, 2018
USD ($)
Dec. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 29, 2018
AUD ($)
Apr. 01, 2018
USD ($)
Mar. 31, 2018
USD ($)
Mar. 30, 2018
KRW (₩)
Debt Instrument [Line Items]                
Loans maturity, description   Various            
PNC Bank, National Association, as Administrative Agent, and Lender Party [Member]                
Debt Instrument [Line Items]                
Interest expense recognized   $ 12,799,000 $ 4,082,000 $ 483,000        
Loan maturity date   Apr. 03, 2023            
PNC Bank, National Association, as Administrative Agent, and Lender Party [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Credit facilities, maximum capacity             $ 300,000,000  
Interest rate in effect         4.51%      
Shinhan Bank [Member]                
Debt Instrument [Line Items]                
Loan maturity date   Mar. 30, 2020            
Shinhan Bank [Member] | Term Loan [Member]                
Debt Instrument [Line Items]                
Credit facilities, maximum capacity | ₩               ₩ 1,000,000
Interest rate in effect         2.05%      
Loan maturity date   Mar. 30, 2020            
National Australia Bank [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Credit facilities, maximum capacity         $ 3,000,000      
Fixed margin interest rate         1.60%      
Credit facilities, frequency of interest payments   monthly            
Interest rate description   daily interest rate plus a fixed margin of 1.6%, 5.6%            
National Australia Bank [Member] | Revolving Credit Facility [Member] | Maximum [Member]                
Debt Instrument [Line Items]                
Interest rate in effect         5.60%      
Amended Credit Agreement [Member]                
Debt Instrument [Line Items]                
Credit facilities, maximum capacity           $ 400,000,000    
Line of credit facility term loan aggregate principal amount           100,000,000    
Accordion feature to increase maximum capacity           $ 200,000,000    
Credit facilities, quarterly term loan payment   $ 1,250,000            
Amended Credit Agreement [Member] | Line of Credit Term Loan Payment on July 2020 [Member]                
Debt Instrument [Line Items]                
Credit facilities, quarterly term loan payment   1,875,000            
Amended Credit Agreement [Member] | Line of Credit Term Loan Payment on July 2022 [Member]                
Debt Instrument [Line Items]                
Credit facilities, quarterly term loan payment   $ 2,500,000            
Amended Credit Agreement [Member] | Term Loan [Member]                
Debt Instrument [Line Items]                
Cash consideration transferred through revolving credit facility $ 258,000,000              
Other Long-Term Debt [Member] | National Australia Bank [Member]                
Debt Instrument [Line Items]                
Loans, frequency of payments   monthly            
Loans maturity, description   The loans mature at various dates through June 2023.            
Other Long-Term Debt [Member] | National Australia Bank [Member] | Maximum [Member]                
Debt Instrument [Line Items]                
Interest rates         5.10%      
Other Long-Term Debt [Member] | National Australia Bank [Member] | Minimum [Member]                
Debt Instrument [Line Items]                
Interest rates         3.90%