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Interim Financial Statements (Details)
1 Months Ended 3 Months Ended
Jul. 31, 2004
shares
Sep. 30, 2020
ft²
property
Dec. 31, 2019
ft²
property
Real Estate Properties [Line Items]      
Reorganization and conversion, number of common shares (in shares) | shares 1.42857    
Contractual base rent and common area maintenance reimbursables billed, percentage   90.00%  
Wholly Owned Properties [Member]      
Real Estate Properties [Line Items]      
Number of properties   58 58
Retail Site [Member] | Wholly Owned Properties [Member] | Community Centered Properties™ [Member]      
Real Estate Properties [Line Items]      
Number of properties   52  
Land [Member] | Wholly Owned Properties [Member] | Community Centered Properties™ [Member] | Redevelopment, New Acquisitions Portfolio [Member]      
Real Estate Properties [Line Items]      
Number of properties   1  
Land [Member] | Wholly Owned Properties [Member] | Parcels Held for Future Development [Member] | Redevelopment, New Acquisitions Portfolio [Member]      
Real Estate Properties [Line Items]      
Number of properties   5  
Pillarstone Capital REIT Operating Partnership LP [Member]      
Real Estate Properties [Line Items]      
Ownership interest   81.40%  
Pillarstone Capital REIT Operating Partnership LP [Member] | Unconsolidated Properties [Member]      
Real Estate Properties [Line Items]      
Number of properties   8 8
Gross leasable area (in square feet) | ft²   926,798 926,798