v3.26.1
Note 4 - Shareholders' Equity (Details Textual)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 27, 2021
$ / shares
shares
Dec. 08, 2016
Jun. 30, 2003
USD ($)
shares
Jun. 30, 2003
USD ($)
Mar. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
$ / shares
shares
Dec. 31, 2021
shares
Dec. 31, 2022
shares
Sep. 29, 2006
$ / shares
shares
Shares Authorized to Issue, Maximum         450,000,000        
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.01 $ 0.01      
Common Stock, Shares Authorized (in shares)         400,000,000 400,000,000      
Preferred Stock, Shares Authorized (in shares)         50,000,000        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.01        
Pillarstone Capital R E I T Operating Partnership L P [Member] | General Partner [Member]                  
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest   18.60%   18.60%          
Chairman and Previous Chief Executive Officer and President and Previous Chief Financial Officer and Senior Vice President [Member] | Conversion of Series A Preferred Stock to Common Shares [Member]                  
Conversion of Stock, Shares Converted (in shares)             534,668    
Conversion of Stock, Shares Issued (in shares)             163,116    
Restricted Stock [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period         0 0      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number         168,449 168,449   168,449  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested and Unexercised, Number of Shares         5,333        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Grant Date Fair Value | $         $ 79        
Restricted Stock [Member] | Vest Upon Meeting Performance Goals [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number         163,116        
Share-Based Payment Arrangement, Expense | $         $ 0        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Grant Date Fair Value | $         $ 1,800        
Series A Preferred Stock [Member]                  
Preferred Stock, Shares Authorized (in shares)         1,518,000 1,518,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.01 $ 0.01      
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         256,636 256,636      
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares         $ 10        
Series A Preferred Stock [Member] | Restricted Stock [Member] | Chairman and Previous Chief Executive Officer and President and Previous Chief Financial Officer and Senior Vice President [Member]                  
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         161,410        
Deferred Compensation Arrangement with Individual, Shares Issued     696,078            
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued | $     $ 2,400            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Minimum Gross Assets | $     $ 50,000 $ 50,000          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period         0        
Preferred Stock, Convertible, Conversion Ratio         0.305        
Series A Preferred Stock [Member] | Public Holders [Member]                  
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         95,226        
Series A Preferred Stock [Member] | Other Holders [Member]                  
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         95,226        
Preferred Stock, Convertible, Conversion Ratio         0.046        
Series C Preferred Stock [Member]                  
Preferred Stock, Shares Authorized (in shares)         300,000 300,000     300,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.01       $ 0.01 $ 0.01      
Preferred Stock, Convertible, Conversion Price | $ / shares                 $ 1
Preferred Stock, Shares Outstanding, Ending Balance (in shares)         231,944 231,944      
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares         $ 10 $ 10     $ 10
Preferred Share Purchase Right [Member]                  
Stock Dividends, Shares 1                
Preferred Unit, Convertible, Conversion Ratio 1                
Preferred Stock, Convertible, Conversion Price | $ / shares $ 7                
Preferred Stock, Exercisable Period 10 days                
Preferred Stock, Convertible, Maximum Beneficial Ownership 5.00%                
Preferred Stock, Convertible, Market Value, Multiplier of Purchase Price 2                
Preferred Stock, Convertible, Percentage of Consolidated Assets 50.00%                
Preferred Share Purchase Right [Member] | Certain Passive Institutional Investors [Member]                  
Preferred Stock, Convertible, Maximum Beneficial Ownership 20.00%                
Series D Preferred Stock [Member]                  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.01