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INTEREST RATE SWAP (Details) - USD ($)
6 Months Ended
Jun. 30, 2018
Apr. 30, 2016
Derivative [Line Items]    
Face amount of debt $ 180,632,517  
Wells Fargo Mortgage Note Payable Originated April 15, 2016    
Derivative [Line Items]    
Face amount of debt $ 24,886,938 $ 24,900,000
Derivative fixed interest rate (as a percent) 3.17%  
Interest Rate Swap    
Derivative [Line Items]    
Effectiveness of interest rate cash flow hedge (as a percent) 100.00%  
Notional amount $ 24,900,000  
Derivative fixed interest rate (as a percent) 3.17%  
Interest Rate Swap | Other Assets    
Derivative [Line Items]    
Fair value of interest rate swap agreement to hedge cash flows $ 913,000