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Debt - EBGL Premier Note (Details) - Revolving Credit Facility - Line of Credit - EBGL Premier Note - USD ($)
12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 30, 2017
Debt Instrument [Line Items]      
Maximum borrowing capacity   $ 1,000,000.0 $ 3,000,000.0
Interest rate   5.75%  
Minimum debt service coverage ratio 100.00%    
Debt covenant, audited financial statements delivery period 120 days    
Prime Rate      
Debt Instrument [Line Items]      
Interest rate     1.50%