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UNCONSOLIDATED INVESTMENT IN REAL ESTATE PROPERTY - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
ft²
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
ft²
Jun. 30, 2021
USD ($)
Dec. 31, 2017
ft²
Schedule of Equity Method Investments [Line Items]          
Number of square feet of aggregate leasable space (in square foot) 2,900,000   2,900,000    
Rich Uncles Real Estate Investment Trust          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage         72.70%
Number of square feet of aggregate leasable space (in square foot)         91,740
Ownership percentage by noncontrolling owners         27.30%
Dividends | $ $ 51,786 $ 82,588 $ 147,153 $ 161,967  
Rich Uncles Real Estate Investment Trust | Hagg Lane II, LLC          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage by noncontrolling owners         23.40%
Rich Uncles Real Estate Investment Trust | Hagg Lane III, LLC          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage by noncontrolling owners         3.90%