Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

v3.20.4
Commitments and Contingencies (Details) - USD ($)
12 Months Ended
Dec. 15, 2020
Oct. 01, 2020
Sep. 04, 2020
Mar. 10, 2020
Dec. 31, 2020
Dec. 31, 2019
May 31, 2020
Jan. 30, 2020
Sep. 01, 2011
Loss Contingencies [Line Items]                  
Loss contingency, amount of damages sought $ 400,000                
Former gain contingency, recognized in current period             $ 196,000    
Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority                  
Loss Contingencies [Line Items]                  
Debt issued                 $ 2,420,000
Number of semi-annual payment installments                 50
Gaurantor obligations, maximum exposure amount                 $ 2,210,000
Guarantor obligations funded         $ 0 $ 79,000      
Amounts accrued for guarantor obligations         $ 0        
Minimum | Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority                  
Loss Contingencies [Line Items]                  
Debt interest rate                 2.29%
Maximum | Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority                  
Loss Contingencies [Line Items]                  
Debt interest rate                 14.00%
Guarantee of Indebtedness of Others                  
Loss Contingencies [Line Items]                  
Loss contingency, damages awarded, value   $ 500,000 $ 520,000 $ 5,000          
Southeast                  
Loss Contingencies [Line Items]                  
Percentage accounted by properties of its annualized base rent         61.00%        
Northeast                  
Loss Contingencies [Line Items]                  
Percentage accounted by properties of its annualized base rent         4.00%        
Mid Atlantic                  
Loss Contingencies [Line Items]                  
Percentage accounted by properties of its annualized base rent         35.00%        
Land | Construction Loan | Affiliated Entity                  
Loss Contingencies [Line Items]                  
Credit bid purchase approved by the bankruptcy court               $ 200,000