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FAIR VALUE OF FINANCIAL INSTRUMENTS - Measured on a Recurring Basis (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Fair value of assets    
Cash Flow Hedge $ 844,796 $ 606,621
Total   606,621
Significant Other Observable Inputs (Level 2)    
Fair value of assets    
Total   606,621
Interest Rate Swap    
Fair value of assets    
Cash Flow Hedge   606,621
Interest Rate Swap | Significant Other Observable Inputs (Level 2)    
Fair value of assets    
Cash Flow Hedge   $ 606,621
Recurring basis    
Fair value of assets    
Total 844,796  
Recurring basis | Significant Other Observable Inputs (Level 2)    
Fair value of assets    
Total 844,796  
Recurring basis | Interest Rate Swap    
Fair value of assets    
Cash Flow Hedge 844,796  
Recurring basis | Interest Rate Swap | Significant Other Observable Inputs (Level 2)    
Fair value of assets    
Cash Flow Hedge $ 844,796