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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details)
3 Months Ended
Dec. 19, 2019
USD ($)
Aug. 20, 2019
USD ($)
derivative
termLoan
Mar. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Jun. 24, 2020
USD ($)
Derivative [Line Items]            
Number of mortgage term loans | termLoan   2        
Obligations under interest rate swap contracts       $ 393,479 $ 993,516  
Mortgage-Secured Term Loans | East West Bank | London Interbank Offered Rate (LIBOR)            
Derivative [Line Items]            
Basis spread on variable rate   2.25%        
Fixed rate determined by interest rate swaps   0.0423        
Mortgage-Secured Term Loans | Bank of America | London Interbank Offered Rate (LIBOR)            
Derivative [Line Items]            
Basis spread on variable rate 2.15%          
Fixed rate determined by interest rate swaps 0.0425          
Interest Rate Swap            
Derivative [Line Items]            
Number of derivatives | derivative   2        
Interest Rate Swap | Not Designated as Hedging Instrument            
Derivative [Line Items]            
Derivative liability, notional amount $ 2,740,000 $ 1,050,000.00       $ 80,000,000
Gain (loss) on discontinuation of derivative instrument     $ 718,600      
Interest Rate Swap Member Two | Not Designated as Hedging Instrument            
Derivative [Line Items]            
Derivative liability, notional amount   $ 2,625,000