Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Jul. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]        
Asset impairment charges   $ 0 $ 0 $ 0
Impairment of land-discontinued operations   3,938,000 0 0
Conditional asset retirement obligation liability   $ 0 0  
Investment maturity period   90 days    
Insurance coverage provided to a depositor's other deposit accounts held at an FDIC-insured institution   $ 250,000    
Past due rent charge term   5 days    
Allowance for uncollectible accounts   $ 1,260,000 705,000  
Bad debt expenses   511,000 457,000  
Tenants recovery   0 0 0
Impairment of goodwill   5,486,000 0 0
Accumulated amortization of intangibles   50,550,000 41,830,000  
Amortization expense of Intangible Assets   $ 14,430,000 15,640,000 12,750,000
Minimum percentage of taxable income to be distributed to stockholders   90.00%    
Provision for federal and state income taxes   $ 13,000 $ 15,000  
Term of disqualification to be taxed as a REIT due to loss of REIT status   5 years    
Property management fee percentage   3.00%    
Asset management fee percentage   2.00%    
Development fee percentage   5.00% 5.00%  
Advertising and promotion costs   $ 261,000 $ 237,000 228,000
Lease termination expense $ 250,000 $ 250,000 $ 0 0
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01  
(Reduction) increase in net cash provided by operating activities   $ 22,002,000 $ 23,818,000 11,100,000
(Reduction) increase in net cash provided by investing activities   $ (22,450,000) (3,079,000) (59,136,000)
Accounting Standards Update 2016-18 [Member]        
Property, Plant and Equipment [Line Items]        
(Reduction) increase in net cash provided by operating activities     (942,000) 658,000
(Reduction) increase in net cash provided by investing activities     (101,000) 1,400,000
Buildings and improvements | Minimum [Member]        
Property, Plant and Equipment [Line Items]        
Estimated useful life of buildings and improvements   5 years    
Buildings and improvements | Maximum [Member]        
Property, Plant and Equipment [Line Items]        
Estimated useful life of buildings and improvements   40 years    
Rent and Other Tenant Receivables, Net [Member]        
Property, Plant and Equipment [Line Items]        
Unbilled rent asset, net   $ 3,120,000 2,340,000  
Ladson Crossing [Member]        
Property, Plant and Equipment [Line Items]        
Amortization of deferred charges   $ 1,380,000    
Shoppes at Myrtle Park Bi-Lo [Member]        
Property, Plant and Equipment [Line Items]        
Amortization of deferred charges     1,740,000  
Renewed Lease [Member]        
Property, Plant and Equipment [Line Items]        
Commission fee percentage   3.00%    
New Lease [Member]        
Property, Plant and Equipment [Line Items]        
Commission fee percentage   6.00%    
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]        
Property, Plant and Equipment [Line Items]        
Impairment of land-discontinued operations   $ 3,938,000 $ 0 $ 0