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Long-Term Debt - Revolving Credit Facility (Details) - Montreign Operating [Member] - USD ($)
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit $ 15,000,000 $ 15,000,000
Maximum borrowing capacity $ 15,000,000  
Stated percentage 7.63% 7.71%
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