Quarterly report pursuant to Section 13 or 15(d)

Loans Payable - Summary of Loans Payable (Detail)

v3.5.0.2
Loans Payable - Summary of Loans Payable (Detail) - USD ($)
9 Months Ended
Apr. 28, 2016
Apr. 08, 2016
Sep. 30, 2016
Sep. 30, 2015
Aug. 15, 2016
Jul. 29, 2016
Jul. 11, 2016
Apr. 12, 2016
Dec. 31, 2015
May 29, 2015
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 231,767,262     $ 4,100,000     $ 184,629,082  
Secured debt, gross of unamortized debt issuance cost     238,551,135           189,340,456  
Deferred Finance Costs, Net     $ (6,783,873)           $ (4,711,374)  
Common Stock, Par or Stated Value Per Share     $ 0.01           $ 0.01  
Conversion of senior convertible debt into common stock     $ 1,600,000 $ 0            
KeyBank [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness             $ 4,600,000      
Mortgage Loans Payable, Interest Rate             4.70%      
Line of Credit [Member]                    
Debt Instrument [Line Items]                    
Mortgage Loans Payable, Interest Rate   8.00%                
Proceeds from issuance of secured debt   $ 8,000,000                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   6,000,000 6,000,000              
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 0.0001                
Line of Credit [Member] | Vantage South Bank [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 3,000,000           $ 0  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.25%              
Line of Credit [Member] | Monarch Bank Line Of Credit [Member]                    
Debt Instrument [Line Items]                    
Mortgage Loans Payable, Maturity Period     2017-09              
Line of Credit [Member] | KeyBank [Member]                    
Debt Instrument [Line Items]                    
Interest rate margin above LIBOR, minimum                   1.75%
Interest rate margin above LIBOR, maximum                   2.50%
Mortgages and other indebtedness     $ 46,127,250       $ 3,900,000   6,873,750  
Proceeds from Issuance of Convertible Preferred Stock     $ 46,100,000   $ 46,100,000          
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     3.01%              
Mortgage Loans Payable, Maturity Period     2018-05              
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.30%              
Line of Credit Facility, Maximum Borrowing Capacity               $ 67,200,000   $ 45,000,000
Line of Credit Facility, Commitment Fee Percentage     3.01%              
Line of Credit [Member] | Revere Loan [Member]                    
Debt Instrument [Line Items]                    
Proceeds from issuance of secured debt     $ 7,450,000              
Senior Convertible Notes [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness $ 3,000,000   $ 1,400,000           3,000,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate 9.00%   9.00%              
Mortgage Loans Payable, Maturity Period     2018-12              
Prepayment notice period 30 days                  
Number of shares issuable upon conversion (in shares) 1,417,079                  
Conversion of senior convertible debt into common stock     $ 1,600,000              
Debt Conversion, Converted Instrument, Shares Issued     1,397,010              
Senior Non-Convertible Notes [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 0           2,160,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     9.00%              
Mortgage Loans Payable, Maturity Period     2016-01              
Debt Instrument, Face Amount     $ 2,160,000              
Shoppes at Eagle Harbor [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     3,528,895           3,634,085  
Mortgage Loans Payable, Monthly Payment     $ 25,100              
Mortgage Loans Payable, Interest Rate     4.34%              
Mortgage Loans Payable, Maturity Period     2018-03              
Monarch Bank Building [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 1,334,241           1,376,452  
Mortgage Loans Payable, Monthly Payment     $ 9,473              
Mortgage Loans Payable, Interest Rate     4.15%              
Mortgage Loans Payable, Maturity Period     2017-12              
Perimeter Square [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 4,500,000     $ 4,500,000     4,166,406  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.06%     4.06%        
Mortgage Loans Payable, Maturity Period     2026-08              
Riversedge North [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 926,444           962,281  
Mortgage Loans Payable, Monthly Payment     $ 8,802              
Mortgage Loans Payable, Interest Rate     6.00%              
Mortgage Loans Payable, Maturity Period     2019-01              
Walnut Hill Plaza [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 3,464,362           3,535,606  
Mortgage Loans Payable, Monthly Payment     $ 24,273              
Mortgage Loans Payable, Interest Rate     5.50%              
Mortgage Loans Payable, Maturity Period     2017-07              
Twin City Commons [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 3,184,056           3,225,473  
Mortgage Loans Payable, Monthly Payment     $ 17,827              
Mortgage Loans Payable, Interest Rate     4.86%              
Mortgage Loans Payable, Maturity Period     2023-01              
Shoppes at TJ Maxx [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 5,951,648           6,081,272  
Mortgage Loans Payable, Monthly Payment     $ 33,880              
Mortgage Loans Payable, Interest Rate     3.88%              
Mortgage Loans Payable, Maturity Period     2020-05              
Forrest Gallery [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 8,834,660           8,926,712  
Mortgage Loans Payable, Monthly Payment     $ 50,973              
Mortgage Loans Payable, Interest Rate     5.40%              
Mortgage Loans Payable, Maturity Period     2023-09              
Tampa Festival [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 8,534,790           8,627,294  
Mortgage Loans Payable, Monthly Payment     $ 50,797              
Mortgage Loans Payable, Interest Rate     5.56%              
Mortgage Loans Payable, Maturity Period     2023-09              
Winslow Plaza [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 4,620,000           4,620,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.82%              
Mortgage Loans Payable, Maturity Period     2025-12              
Cypress Shopping Center [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 6,609,876           6,625,000  
Mortgage Loans Payable, Monthly Payment     $ 34,360              
Mortgage Loans Payable, Interest Rate     4.70%              
Mortgage Loans Payable, Maturity Period     2024-07              
Harrodsburg Marketplace [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 3,632,616           3,677,501  
Mortgage Loans Payable, Monthly Payment     $ 19,112              
Mortgage Loans Payable, Interest Rate     4.55%              
Mortgage Loans Payable, Maturity Period     2024-09              
Port Crossing Shopping Center [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 6,396,584           6,471,636  
Mortgage Loans Payable, Monthly Payment     $ 34,788              
Mortgage Loans Payable, Interest Rate     4.84%              
Mortgage Loans Payable, Maturity Period     2024-08              
LaGrange Marketplace [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 2,381,726           2,418,212  
Mortgage Loans Payable, Monthly Payment     $ 15,065              
Mortgage Loans Payable, Interest Rate     5.50%              
Mortgage Loans Payable, Maturity Period     2020-03              
Freeway Junction [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 8,150,000           8,150,000  
Mortgage Loans Payable, Monthly Payment     $ 31,265              
Mortgage Loans Payable, Interest Rate     4.60%              
Mortgage Loans Payable, Maturity Period     2024-09              
DF I-Edenton [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Periodic Payment, Principal     $ 250,000              
Mortgages and other indebtedness     0           650,000  
Mortgage Loans Payable, Monthly Payment     $ 250,000              
Mortgage Loans Payable, Interest Rate     3.75%              
Mortgage Loans Payable, Maturity Period     2016-09              
DF I-Moyock [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 337,169           418,538  
Mortgage Loans Payable, Monthly Payment     $ 10,665              
Mortgage Loans Payable, Interest Rate     5.00%              
Mortgage Loans Payable, Maturity Period     2019-07              
Graystone Crossing [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 4,000,000           4,000,000  
Mortgage Loans Payable, Monthly Payment     15672              
Mortgage Loans Payable, Interest Rate     4.55%              
Mortgage Loans Payable, Maturity Period     2024-10              
Bryan Station [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 4,625,000           4,625,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.52%              
Mortgage Loans Payable, Maturity Period     2024-11              
Crockett Square [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 6,337,500           6,337,500  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.47%              
Mortgage Loans Payable, Maturity Period     2024-12              
Harbor Point [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 664,864           732,685  
Mortgage Loans Payable, Monthly Payment     $ 11,024              
Mortgage Loans Payable, Interest Rate     5.85%              
Mortgage Loans Payable, Maturity Period     2016-12              
Pierpont Centre [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 8,450,000           8,450,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.15%              
Mortgage Loans Payable, Maturity Period     2025-02              
Alex City Marketplace [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 5,750,000           5,750,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     3.95%              
Mortgage Loans Payable, Maturity Period     2025-04              
Butler Square [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 5,640,000           5,640,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     3.90%              
Mortgage Loans Payable, Maturity Period     2025-05              
Brook Run Shopping Center [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 10,950,000           10,950,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.08%              
Mortgage Loans Payable, Maturity Period     2025-06              
Beaver Village I and II [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 9,400,000           9,400,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.73%              
Mortgage Loans Payable, Maturity Period     2025-07              
Columbia Fire Station [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 477,788           450,053  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     8.00%              
Mortgage Loans Payable, Maturity Period     2025-07              
Sunshine Plaza [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 5,900,000           5,900,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.57%              
Mortgage Loans Payable, Maturity Period     2025-08              
Barnett Portfolio [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 8,770,000           8,770,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.30%              
Mortgage Loans Payable, Maturity Period     2025-09              
Grove Park Shopping Center [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 3,800,000           3,800,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.52%              
Mortgage Loans Payable, Maturity Period     2025-10              
Parkway Plaza Shopping Center [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 3,500,000           3,500,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.57%              
Mortgage Loans Payable, Maturity Period     2025-10              
Conyers Crossing [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 5,960,000           5,960,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.67%              
Mortgage Loans Payable, Maturity Period     2025-10              
Ft. Howard Square [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 7,100,000           7,100,000  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     4.57%              
Mortgage Loans Payable, Maturity Period     2025-10              
Revere Loan [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 7,450,000           0  
Mortgage Loans Payable, Monthly Payment     Interest only              
Mortgage Loans Payable, Interest Rate     8.00%              
South Carolina Food Lions Note [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 12,266,906           12,375,000  
Mortgage Loans Payable, Monthly Payment     $ 68,320              
Mortgage Loans Payable, Interest Rate     5.25%              
Mortgage Loans Payable, Maturity Period     2024-01              
Chesapeake Square [Member]                    
Debt Instrument [Line Items]                    
Mortgages and other indebtedness     $ 4,594,760           $ 0  
Mortgage Loans Payable, Monthly Payment     $ 23,857              
Mortgage Loans Payable, Interest Rate     4.70%              
Mortgage Loans Payable, Maturity Period     2026-08