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Long-Term Debt - Revolving Credit Agreement (Details) - Montreign Operating [Member] - USD ($)
12 Months Ended
Feb. 09, 2018
Jan. 23, 2018
Jan. 24, 2017
Dec. 31, 2017
Dec. 07, 2017
Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity     $ 15,000,000   $ 15,000,000
Borrowings on line of credit       $ 0  
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate     5.00%    
Revolving Credit Facility [Member] | Base Rate [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate     4.00%    
Letter of Credit [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity     $ 10,000,000    
Subsequent Event | Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Borrowings on line of credit $ 4,000,000 $ 9,000,000      
Subsequent Event | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate 5.00%