Quarterly report pursuant to Section 13 or 15(d)

Loans Payable - Additional Information (Details)

v3.20.2
Loans Payable - Additional Information (Details)
9 Months Ended
Sep. 03, 2020
USD ($)
Aug. 01, 2020
USD ($)
Jul. 15, 2020
USD ($)
Jul. 10, 2020
USD ($)
May 20, 2020
USD ($)
Mar. 23, 2020
USD ($)
Jan. 23, 2020
USD ($)
Jan. 21, 2020
USD ($)
Dec. 21, 2019
USD ($)
Sep. 30, 2020
USD ($)
parcel
property
Sep. 04, 2020
USD ($)
Apr. 30, 2020
Dec. 31, 2019
USD ($)
Nov. 05, 2019
USD ($)
Debt Instrument [Line Items]                            
Loans payable, net                   $ 318,230,000     $ 340,913,000  
Number of undeveloped parcels | parcel                   6        
Restricted cash replenishment                     $ 488,000      
Scheduled maturities of long-term debt in the next twelve months                   $ 48,590,000        
Shoppes at Myrtle Park                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment             $ 33,000     33,180        
Loans payable, net             $ 6,000,000.00     $ 5,925,000     0  
Debt instrument, interest rate. stated percentage 4.00%           4.45%     4.45%        
Village of Martinsville                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment                   $ 89,664        
Loans payable, net                   $ 16,074,000     16,351,000  
Debt instrument, interest rate. stated percentage                   4.28%        
Laburnum Square                            
Debt Instrument [Line Items]                            
Loans payable, net                   $ 7,665,000     7,665,000  
Debt instrument, interest rate. stated percentage                   4.28%        
Folly Road                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment           $ 41,000       $ 41,482        
Loans payable, net           $ 7,350,000       $ 7,262,000     5,922,000  
Debt instrument, interest rate. stated percentage           4.65%       4.65%        
Columbia Fire Station                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment $ 46,000                 $ 45,580        
Loans payable, net                   $ 3,957,000     4,051,000  
Debt instrument, interest rate. stated percentage                   4.00%        
Shoppes at TJ Maxx                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment   $ 34,000               $ 33,880        
Loans payable, net   $ 5,280,000               $ 5,244,000     5,344,000  
Debt instrument, interest rate. stated percentage                   3.88%        
Walnut Hill Plaza                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment     $ 443,000                      
Loans payable, net     $ 3,300,000             $ 3,287,000     3,759,000  
Debt instrument, interest rate. stated percentage                   5.50%        
Rivergate                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment       $ 48,000           $ 102,795        
Loans payable, net                   21,307,000     21,545,000  
KeyBank                            
Debt Instrument [Line Items]                            
Debt instrument, interest rate. stated percentage                       1.00%    
Line of Credit | First National Bank Line of Credit                            
Debt Instrument [Line Items]                            
Debt instrument, periodic payment                   24,656        
Loans payable, net                   $ 1,127,000     1,214,000  
Line of Credit | KeyBank                            
Debt Instrument [Line Items]                            
Number of collateral properties | property                   5        
Debt instrument, periodic payment         $ 2,500,000   $ 5,750,000 $ 1,780,000 $ 350,000 $ 350,000        
Borrowings outstanding under line of credit                   $ 4,350,000        
Interest rate on line of credit facility at the end of period                   3.65%        
Loans payable, net                   $ 4,350,000     $ 17,879,000  
Commercial Real Estate | Line of Credit | KeyBank                            
Debt Instrument [Line Items]                            
Borrowings outstanding under line of credit                           $ 15,000,000.00