Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.19.3
Commitments and Contingencies (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Apr. 30, 2019
USD ($)
loan
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
$ / shares
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
$ / shares
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Sep. 01, 2011
USD ($)
Loss Contingencies [Line Items]                
Loss contingency, amount of damages sought   $ 1,000,000 $ 0       $ 0  
Debt instrument, interest rate. stated percentage     5.00%   5.00%      
Series D Preferred Stock                
Loss Contingencies [Line Items]                
Preferred stock, liquidation price per share (in dollars per share) | $ / shares     $ 25.00   $ 25.00      
Northeast                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent     4.00%   4.00%      
Mid Atlantic                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent     36.00%   36.00%      
Southeast                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent     60.00%   60.00%      
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               $ 2,415,000
Number of semi-annual payment installments               50
Guarantor obligations, maximum exposure amount               $ 2,260,000
Guarantor obligations funded     $ 0 $ 0 $ 44,000 $ 5,000    
Amounts accrued for guarantor obligations     $ 0   $ 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 instrument, interest rate. stated percentage               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 instrument, interest rate. stated percentage               14.00%
Guarantee of Indebtedness of Others                
Loss Contingencies [Line Items]                
Loss contingency, amount of damages sought   $ 150,000            
Construction Loan | Affiliated Entity | Partial Funding of Sea Turtle Development Note | Guarantee of Indebtedness of Others                
Loss Contingencies [Line Items]                
Loss contingency, amount of damages sought $ 0              
Number of loans in default | loan 2