v3.26.1
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2023
Jun. 01, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2023  
Document Transition Report false  
Entity File Number 001-15409  
Entity Registrant Name PILLARSTONE CAPITAL REIT  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 39-6594066  
Entity Address, Address Line One 9825 E. Bell Rd., Suite 130  
Entity Address, City or Town Scottsdale  
Entity Address, State or Province AZ  
Entity Address, Postal Zip Code 85260  
City Area Code 281  
Local Phone Number 747-9997  
Entity Current Reporting Status No  
Entity Interactive Data Current No  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   657,084
Entity Central Index Key 0000928953  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q3  
Amendment Flag false