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INTEREST RATE SWAP DERIVATIVES - Fair Value of Derivative Instruments (Details)
Dec. 31, 2019
USD ($)
instrument
Dec. 31, 2018
USD ($)
instrument
Derivatives, Fair Value [Line Items]    
Derivative Asset $ 34,567 $ 151,215
Derivative liability $ (1,021,724) $ (300,929)
Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 12 4
Liability | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 7 2
Derivative liability $ (1,021,724) $ (300,929)
Assets | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 5 2
Derivative Asset $ 34,567 $ 151,215
REIT I | Liability | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 3  
Derivative liability $ (51,514)  
REIT I | Assets | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 5  
Derivative Asset $ 34,567