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INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (345 Franklin) (Details)
1 Months Ended 12 Months Ended
Sep. 12, 2016
USD ($)
Jun. 30, 2013
USD ($)
Dec. 31, 2022
USD ($)
property
Dec. 31, 2021
USD ($)
property
Dec. 31, 2020
USD ($)
property
Jun. 16, 2022
USD ($)
Jun. 15, 2022
USD ($)
Nov. 30, 2021
USD ($)
Nov. 29, 2021
USD ($)
Mar. 02, 2005
USD ($)
Nov. 30, 2001
USD ($)
item
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Investments in joint venture     $ 1,437,387 $ 1,455,888           $ 2,352,000  
Mortgage amount           $ 80,284,000 $ 37,065,000 $ 156,000,000 $ 65,305,000    
Repayment of loan $ 5,158,000                    
Distribution to the Partnership     9,267,981 4,673,140 $ 4,675,754            
Outstanding amount of mortgage     $ 410,966,199 $ 370,481,390              
Maximum | Mortgages payable                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Interest rate (as a percent)     4.95%                
345 Franklin                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Investments in joint venture                     $ 1,533,000
Ownership interest (as a percent)                     50.00%
Number of units | item                     40
Distribution to the Partnership   $ 1,610,000                  
345 Franklin | Mortgages payable                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Interest rate (as a percent)   3.87%                  
Borrowings   $ 10,000,000                  
345 Franklin | Mortgage, 3.87%, June 2013                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Term of debt   15 years                  
Outstanding amount of mortgage     $ 8,714,000                
345 Franklin | Mortgage, 3.87%, June 2013 | Mortgages payable                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Period for which the entity is required to make interest only payments   3 years                  
Amortization period of debt   30 years                  
345 Franklin | Mortgage, Paid off June 2013 | Mortgages payable                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Repayment of loan   $ 6,776,000                  
345 Franklin                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Number of units | property     40 40 40            
Outstanding amount of mortgage     $ 8,676,945 $ 8,892,331 $ 9,099,301            
345 Franklin | Residential buildings                      
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES                      
Number of units | property     40 40 40