Loans Payable - Summary of Loans Payable (Detail) - USD ($) | 9 Months Ended | |
Sep. 30, 2015 | Dec. 31, 2014 |
Debt Instrument [Line Items] | | |
Mortgages and other indebtedness | $ 186,283,498 | $ 120,865,586 |
January 2016 [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 9.00% | |
Mortgage Loans Payable, Maturity Period | 2016-01 | |
Mortgages and other indebtedness | $ 2,160,000 | 2,160,000 |
Senior Convertible Notes [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 9.00% | |
Mortgage Loans Payable, Maturity Period | 2018-12 | |
Mortgages and other indebtedness | $ 3,000,000 | 6,000,000 |
Senior Non-Convertible Notes [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 9.00% | |
Mortgage Loans Payable, Maturity Period | 2015-12 | |
Mortgages and other indebtedness | $ 4,000,000 | 4,000,000 |
Shoppes at Eagle Harbor [Member] | Interest at Fixed Rate of 4.34% [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 25,100 | |
Mortgage Loans Payable, Interest Rate | 4.34% | |
Mortgage Loans Payable, Maturity Period | 2018-03 | |
Mortgages and other indebtedness | $ 3,670,562 | 3,773,319 |
Lumber River Plaza [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 18,414 | |
Mortgage Loans Payable, Interest Rate | 5.65% | |
Mortgage Loans Payable, Maturity Period | 2015-05 | |
Mortgages and other indebtedness | $ 0 | 2,894,862 |
Monarch Bank Building [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Maturity Period | 2017-12 | |
Perimeter Square [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 28,089 | |
Mortgage Loans Payable, Interest Rate | 6.38% | |
Mortgage Loans Payable, Maturity Period | 2016-06 | |
Mortgages and other indebtedness | $ 4,198,947 | 4,294,216 |
Riversedge North [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 8,802 | |
Mortgage Loans Payable, Interest Rate | 6.00% | |
Mortgage Loans Payable, Maturity Period | 2019-01 | |
Mortgages and other indebtedness | $ 973,975 | 1,007,856 |
Walnut Hill Plaza [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 24,273 | |
Mortgage Loans Payable, Interest Rate | 5.50% | |
Mortgage Loans Payable, Maturity Period | 2017-07 | |
Mortgages and other indebtedness | $ 3,559,055 | 3,626,945 |
Harps at Harbor Point [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Maturity Period | 2015-12 | |
Twin City Commons [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 17,827 | |
Mortgage Loans Payable, Interest Rate | 4.86% | |
Mortgage Loans Payable, Maturity Period | 2023-01 | |
Mortgages and other indebtedness | $ 3,239,229 | 3,279,076 |
Shoppes at TJ Maxx [Member] | Maturity on May 2020 [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 33,880 | |
Mortgage Loans Payable, Interest Rate | 3.88% | |
Mortgage Loans Payable, Maturity Period | 2020-05 | |
Mortgages and other indebtedness | $ 6,123,650 | 6,248,349 |
Bixby Commons [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Maturity Period | 2018-06 | |
Line of Credit [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.25% | |
Line of Credit, Current | $ 0 | |
Mortgage Loans Payable, Maturity Period | 2015-09 | |
Mortgages and other indebtedness | | 2,074,432 |
Forrest Gallery [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 50,973 | |
Mortgage Loans Payable, Interest Rate | 5.40% | |
Mortgage Loans Payable, Maturity Period | 2023-09 | |
Mortgages and other indebtedness | $ 8,957,445 | 9,045,880 |
Jenks Reasors [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Maturity Period | 2016-09 | |
Tampa Festival [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 50,797 | |
Mortgage Loans Payable, Interest Rate | 5.56% | |
Mortgage Loans Payable, Maturity Period | 2023-09 | |
Mortgages and other indebtedness | $ 8,658,145 | 8,746,860 |
Starbucks/Verizon [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Maturity Period | 2019-07 | |
Winslow Plaza [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 5.22% | |
Mortgage Loans Payable, Maturity Period | 2015-12 | |
Mortgages and other indebtedness | $ 5,000,000 | 5,000,000 |
Cypress Shopping Center [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.70% | |
Mortgage Loans Payable, Maturity Period | 2024-07 | |
Mortgages and other indebtedness | $ 6,625,000 | 6,625,000 |
Harrodsburg Marketplace [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | 19,112 | |
Mortgage Loans Payable, Interest Rate | 4.55% | |
Mortgage Loans Payable, Maturity Period | 2024-09 | |
Mortgages and other indebtedness | $ 3,692,427 | 3,735,739 |
Port Crossing Shopping Center [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 34,788 | |
Mortgage Loans Payable, Interest Rate | 4.84% | |
Mortgage Loans Payable, Maturity Period | 2024-08 | |
Mortgages and other indebtedness | $ 6,496,619 | 6,568,918 |
LaGrange Marketplace [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | 13,813 | |
Mortgage Loans Payable, Interest Rate | 5.50% | |
Mortgage Loans Payable, Maturity Period | 2020-02 | |
Mortgages and other indebtedness | $ 2,430,046 | 2,463,909 |
Freeway Junction [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.60% | |
Mortgage Loans Payable, Maturity Period | 2024-09 | |
Mortgages and other indebtedness | $ 8,150,000 | 8,150,000 |
DF I-Courtland [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 1,411 | |
Mortgage Loans Payable, Interest Rate | 6.50% | |
Mortgage Loans Payable, Maturity Period | 2019-01 | |
Mortgages and other indebtedness | $ 0 | 115,728 |
DF I-Edenton [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Interest Rate | 3.75% | |
Mortgage Loans Payable, Maturity Period | 2016-09 | |
Mortgages and other indebtedness | $ 1,150,000 | 1,650,000 |
Debt Instrument, Periodic Payment, Principal | 250,000 | |
DF I-Moyock [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 10,665 | |
Mortgage Loans Payable, Interest Rate | 5.00% | |
Mortgage Loans Payable, Maturity Period | 2019-07 | |
Mortgages and other indebtedness | $ 445,021 | 522,430 |
Graystone Crossing [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | 20,386 | |
Mortgage Loans Payable, Interest Rate | 4.55% | |
Mortgage Loans Payable, Maturity Period | 2024-10 | |
Mortgages and other indebtedness | $ 4,000,000 | 4,000,000 |
Bryan Station [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.52% | |
Mortgage Loans Payable, Maturity Period | 2024-11 | |
Mortgages and other indebtedness | $ 4,625,000 | 4,625,000 |
Crockett Square [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.47% | |
Mortgage Loans Payable, Maturity Period | 2024-12 | |
Mortgages and other indebtedness | $ 6,337,500 | 6,337,500 |
Harbor Point [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | $ 11,024 | |
Mortgage Loans Payable, Interest Rate | 5.85% | |
Mortgage Loans Payable, Maturity Period | 2016-12 | |
Mortgages and other indebtedness | $ 754,706 | 1,544,567 |
Pierpont Centre [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 3.95% | |
Mortgage Loans Payable, Maturity Period | 2025-02 | |
Mortgages and other indebtedness | $ 8,450,000 | 0 |
Alex City Marketplace [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 3.90% | |
Mortgage Loans Payable, Maturity Period | 2025-04 | |
Mortgages and other indebtedness | $ 5,750,000 | 0 |
Butler Square [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.08% | |
Mortgage Loans Payable, Maturity Period | 2025-04 | |
Mortgages and other indebtedness | $ 5,640,000 | 0 |
Brook Run Shopping Center [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 3.90% | |
Mortgage Loans Payable, Maturity Period | 2025-06 | |
Mortgages and other indebtedness | $ 10,950,000 | 0 |
South Carolina Food Lions Note [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 5.25% | |
Mortgage Loans Payable, Maturity Period | 2024-01 | |
Mortgages and other indebtedness | $ 12,375,000 | 12,375,000 |
Beaver Ruin Village [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.73% | |
Mortgage Loans Payable, Maturity Period | 2025-07 | |
Mortgages and other indebtedness | $ 9,400,000 | 0 |
Beaver Ruin Village II [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Maturity Period | | |
Columbia Fire Station [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 8.00% | |
Mortgage Loans Payable, Maturity Period | 2025-07 | |
Mortgages and other indebtedness | $ 441,171 | 0 |
Sunshine Plaza [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.57% | |
Mortgage Loans Payable, Maturity Period | 2025-08 | |
Mortgages and other indebtedness | $ 5,900,000 | 0 |
Barnett Portfolio [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.30% | |
Mortgage Loans Payable, Maturity Period | 2025-09 | |
Mortgages and other indebtedness | $ 8,770,000 | 0 |
Grove Park Shopping Center [Member] | | |
Debt Instrument [Line Items] | | |
Mortgage Loans Payable, Monthly Payment | Interest only | |
Mortgage Loans Payable, Interest Rate | 4.52% | |
Mortgage Loans Payable, Maturity Period | 2025-10 | |
Mortgages and other indebtedness | $ 3,800,000 | $ 0 |