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Debt - EBGL Line of Credit (Details) - Line of Credit - EBGL Loan Agreement - Revolving Credit Facility - USD ($)
12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 30, 2017
Line of Credit Facility [Line Items]      
Maximum credit amount $ 3,000,000.0   $ 3,000,000.0
Debt instrument, covenant, minimum debt service coverage ratio 100.00%    
Debt instrument, covenant, audited financial statements delivery period 120 days    
Subsequent Event      
Line of Credit Facility [Line Items]      
Maximum credit amount   $ 1,000,000.0  
Stated rate   5.75%  
Prime Rate      
Line of Credit Facility [Line Items]      
Stated rate     1.50%