Annual report pursuant to Section 13 and 15(d)

Credit Facility (Details)

v3.19.1
Credit Facility (Details) - Credit Facility
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Nov. 15, 2017
USD ($)
Credit Facility        
Maximum borrowing capacity       $ 20,000,000
Debt Service Coverage Ratio, minimum       2.0
Leverage Ratio, maximum       2.5
Collateral Coverage Ratio, minimum       1.5
Borrowings outstanding $ 0 $ 0    
Interest expense $ 100,000 $ 100,000 $ 0  
Index        
Credit Facility        
Interest rate 2.39%      
Interest rate margin (as a percent) 1.50%