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Long-Term Debt - Bankok Bank Loan (Details) - Bangkok Bank Loan [Member] - USD ($)
$ in Millions
Dec. 28, 2017
Jun. 30, 2018
Debt Instrument [Line Items]    
Stated percentage   8.34%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 1.50%  
London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Basis spread on variable rate 6.25%  
Base Rate [Member]    
Debt Instrument [Line Items]    
Basis spread on variable rate 5.25%  
Line of Credit [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit   $ 16