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Subsequent Events - Additional Information (Details) - USD ($)
9 Months Ended
Oct. 04, 2019
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Subsequent Event [Line Items]        
Principal repayments on line of credit   $ 1,050,000 $ 800,000  
Line of credit   4,950,000   $ 1,700,000
Morgan Stanley [Member]        
Subsequent Event [Line Items]        
Line of credit   $ 5,000,000    
Morgan Stanley [Member] | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Principal repayments on line of credit $ 680,000      
Line of credit 4,300,000      
Line of credit facility, maximum borrowing capacity $ 6,650,000