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INTEREST RATE SWAP DERIVATIVES - Statement of Financial Position (Details)
Sep. 30, 2021
USD ($)
instrument
Dec. 31, 2020
USD ($)
instrument
Derivatives, Fair Value [Line Items]    
Fair Value | $ $ (1,073,998) $ (1,743,889)
Interest Rate Swaps    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 4 8
Interest Rate Swaps | Liability    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 4 8
Fair Value | $ $ (1,073,998) $ (1,743,889)
Interest Rate Swaps | Assets    
Derivatives, Fair Value [Line Items]    
Number of Instruments | instrument 0 0
Fair Value | $ $ 0 $ 0