Quarterly report pursuant to Section 13 or 15(d)

Loans Payable - Summary of Loans Payable (Details)

v3.10.0.1
Loans Payable - Summary of Loans Payable (Details) - USD ($)
9 Months Ended
Sep. 27, 2018
Jun. 28, 2018
Jun. 19, 2018
Jun. 15, 2018
May 23, 2018
Mar. 11, 2018
Jan. 10, 2018
Sep. 30, 2018
Sep. 07, 2018
Jul. 15, 2018
May 14, 2018
May 03, 2018
Dec. 31, 2017
Debt Instrument [Line Items]                          
Loans payable, net               $ 354,093,000         $ 307,375,000
Total Principal Balance               371,520,000         313,778,000
Unamortized debt issuance cost               (5,570,000)         (5,656,000)
Total Loans Payable, including Assets Held for Sale               365,950,000         308,122,000
Less loans payable on assets held for sale, net loan amortization costs               11,857,000         747,000
First National Bank Line of Credit | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate       3.50%     3.00%            
Lumber River                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment       $ 10,723       10,723          
Debt instrument, interest rate. stated percentage       3.50%                  
Loans payable, net       $ 1,480,000       $ 1,459,000         1,500,000
Lumber River | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate               3.50%          
Harbor Point                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 11,024          
Debt instrument, interest rate. stated percentage               5.85%          
Perimeter Square                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               5.50%          
Loans payable, net               $ 6,250,000         5,382,000
Riversedge North                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 8,802          
Debt instrument, interest rate. stated percentage               6.00%          
Loans payable, net               $ 822,000         863,000
Monarch Bank Building                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 7,340          
Debt instrument, interest rate. stated percentage               4.85%          
Loans payable, net               $ 1,246,000         1,266,000
DF I-Moyock                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 10,665          
Debt instrument, interest rate. stated percentage               5.00%          
Loans payable, net               $ 104,000         194,000
Rivergate                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               141,547          
Loans payable, net               $ 22,260,000         22,689,000
Rivergate | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate               2.95%          
LaGrange Marketplace                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 15,065          
Loans payable, net               $ 0         2,317,000
LaGrange Marketplace | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate               3.75%          
Folly Road                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 32,827          
Debt instrument, interest rate. stated percentage               4.00%          
Loans payable, net               $ 6,109,000         6,181,000
Columbia Fire House construction loan                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.00%          
Loans payable, net               $ 4,200,000         3,421,000
Shoppes at TJ Maxx                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 33,880          
Debt instrument, interest rate. stated percentage               3.88%          
Loans payable, net               $ 5,587,000         5,727,000
JANAF Bravo                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.65%          
Loans payable, net               $ 6,500,000         0
Walnut Hill Plaza                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               5.50%          
Loans payable, net               $ 3,903,000         3,903,000
Twin City Commons                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 17,827          
Debt instrument, interest rate. stated percentage               4.86%          
Loans payable, net               $ 3,064,000         3,111,000
Shoppes at Eagle Harbor                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment           $ 26,528   $ 26,528          
Debt instrument, interest rate. stated percentage           5.10%   5.10%          
Loans payable, net           $ 3,320,000   $ 0         3,341,000
New Market                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment         $ 48,747     $ 48,747          
Debt instrument, interest rate. stated percentage         5.65%     5.65%          
Loans payable, net         $ 7,000,000     $ 6,955,000         0
Benefit Street                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment   $ 53,185           $ 53,185          
Debt instrument, interest rate. stated percentage               5.71% 5.71%        
Loans payable, net               $ 7,600,000 $ 7,600,000       0
Deutsche Bank                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment   $ 33,340           $ 33,340          
Debt instrument, interest rate. stated percentage   5.71%           5.71%          
Loans payable, net   $ 5,740,000           $ 5,730,000         0
JANAF                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 333,159          
Debt instrument, interest rate. stated percentage               4.49%          
Loans payable, net               $ 52,656,000         0
Tampa Festival                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 50,797          
Debt instrument, interest rate. stated percentage               5.56%          
Loans payable, net               $ 8,263,000         8,368,000
Forrest Gallery                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 50,973          
Debt instrument, interest rate. stated percentage               5.40%          
Loans payable, net               $ 8,565,000         8,669,000
South Carolina Food Lions Note                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 68,320          
Debt instrument, interest rate. stated percentage               5.25%          
Loans payable, net               $ 11,915,000         12,050,000
Cypress Shopping Center                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 34,360          
Debt instrument, interest rate. stated percentage               4.70%          
Loans payable, net               $ 6,406,000         6,485,000
Port Crossing                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 34,788          
Debt instrument, interest rate. stated percentage               4.84%          
Loans payable, net               $ 6,179,000         6,263,000
Freeway Junction                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 41,798          
Debt instrument, interest rate. stated percentage               4.60%          
Loans payable, net               $ 7,896,000         7,994,000
Harrodsburg Marketplace                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 19,112          
Debt instrument, interest rate. stated percentage               4.55%          
Loans payable, net               $ 3,503,000         3,553,000
Graystone Crossing                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 20,386          
Debt instrument, interest rate. stated percentage               4.55%          
Loans payable, net               $ 3,880,000         3,928,000
Bryan Station                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 23,489          
Debt instrument, interest rate. stated percentage               4.52%          
Loans payable, net               $ 4,491,000         4,547,000
Crockett Square                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.47%          
Loans payable, net               $ 6,338,000         6,338,000
Pierpont Centre                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.15%          
Loans payable, net               $ 8,113,000         8,113,000
Alex City Marketplace                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               3.95%          
Loans payable, net               $ 5,750,000         5,750,000
Butler Square                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               3.90%          
Loans payable, net               $ 5,640,000         5,640,000
Brook Run Shopping Center                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.08%          
Loans payable, net               $ 10,950,000         10,950,000
Beaver Ruin Village I and II                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.73%          
Loans payable, net               $ 9,400,000         9,400,000
Sunshine Shopping Plaza                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.57%          
Loans payable, net               $ 5,900,000         5,900,000
Barnett Portfolio                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.30%          
Loans payable, net               $ 8,770,000         8,770,000
Fort Howard Shopping Center                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.57%          
Loans payable, net               $ 7,100,000         7,100,000
Conyers Crossing                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.67%          
Loans payable, net               $ 5,960,000         5,960,000
Grove Park Shopping Center                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.52%          
Loans payable, net               $ 3,800,000         3,800,000
Parkway Plaza                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.57%          
Loans payable, net               $ 3,500,000         3,500,000
Winslow Plaza                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.82%          
Loans payable, net               $ 4,620,000         4,620,000
JANAF BJ's                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 29,964          
Debt instrument, interest rate. stated percentage               4.95%          
Loans payable, net               $ 5,091,000         0
Chesapeake Square                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               $ 23,857          
Debt instrument, interest rate. stated percentage               4.70%          
Loans payable, net               $ 4,454,000         4,507,000
Berkley/Sangaree/Tri-County                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.78%          
Loans payable, net               $ 9,400,000         9,400,000
Riverbridge                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.48%          
Loans payable, net               $ 4,000,000         4,000,000
Franklin                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               4.93%          
Loans payable, net               $ 8,516,000         8,516,000
Revere Loan                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment $ 1,300,000 $ 150,000 $ 2,600,000         $ 100,000          
Debt instrument, interest rate. stated percentage               9.00%   10.00% 9.00% 8.00%  
Loans payable, net               $ 1,758,000   $ 3,500,000 $ 3,500,000 $ 6,810,000 6,808,000
Harbor Point                          
Debt Instrument [Line Items]                          
Loans payable, net               477,000         553,000
Line of Credit | First National Bank Line of Credit                          
Debt Instrument [Line Items]                          
Debt instrument, periodic payment               24,656          
Loans payable, net               $ 2,969,000         3,000,000
Line of Credit | First National Bank Line of Credit | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate               3.50%          
Line of Credit | KeyBank Line of Credit Maturing February 2019                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Loans payable, net               $ 3,830,000         15,532,000
Line of Credit | KeyBank Line of Credit Maturing February 2019 | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate               2.50%          
Line of Credit | KeyBank Line of Credit Maturing December 2019                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Loans payable, net               $ 48,272,000         52,500,000
Line of Credit | KeyBank Line of Credit Maturing December 2019 | LIBOR                          
Debt Instrument [Line Items]                          
Debt instrument, basis spread on variable rate               2.50%          
Senior convertible notes | Senior convertible notes                          
Debt Instrument [Line Items]                          
Debt instrument, payment terms               Interest only          
Debt instrument, interest rate. stated percentage               9.00%          
Loans payable, net               $ 1,369,000         $ 1,369,000