v3.25.2
Note 9 - Shareholders' Equity (Details Textual)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended 231 Months Ended
Dec. 27, 2021
$ / shares
shares
Dec. 08, 2016
Jun. 30, 2003
USD ($)
shares
Sep. 30, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
$ / shares
shares
Sep. 30, 2022
USD ($)
$ / shares
shares
Dec. 31, 2020
shares
Sep. 29, 2006
$ / shares
shares
Shares Authorized to Issue, Maximum (in shares)       450,000,000   450,000,000    
Shares Authorized to Issue, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.01   $ 0.01    
Common Stock, Shares Authorized (in shares)       400,000,000 400,000,000 400,000,000    
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.01 $ 0.01 $ 0.01    
Preferred Stock, Shares Authorized (in shares)       50,000,000   50,000,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.01   $ 0.01    
Restricted Stock [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)       0 0      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)       168,449 168,449 168,449 168,449  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested and Unexercised, Number of Shares (in shares)       5,333   5,333    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Vested, Grant Date Fair Value | $       $ 79   $ 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 (in shares)       163,116   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   $ 1,800    
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    
Series A Preferred Stock [Member]                
Preferred Stock, Shares Authorized (in shares)       1,518,000 1,518,000 1,518,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.01 $ 0.01 $ 0.01    
Preferred Stock, Shares Outstanding (in shares)       256,636 256,636 256,636    
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares       $ 10 $ 10 $ 10    
Series A Preferred Stock [Member] | Chairman and Previous Chief Executive Officer and President and Previous Chief Financial Officer and Senior Vice President [Member] | Restricted Stock [Member]                
Preferred Stock, Convertible, Conversion Ratio       0.305   0.305    
Preferred Stock, Shares Outstanding (in shares)       161,410   161,410    
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)     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          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)           0    
Series A Preferred Stock [Member] | Chairman and Previous Chief Executive Officer and President and Previous Chief Financial Officer and Senior Vice President [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche One [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage     50.00%          
Series A Preferred Stock [Member] | Chairman and Previous Chief Executive Officer and President and Previous Chief Financial Officer and Senior Vice President [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage     25.00%          
Series A Preferred Stock [Member] | Chairman and Previous Chief Executive Officer and President and Previous Chief Financial Officer and Senior Vice President [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage     25.00%          
Series A Preferred Stock [Member] | Public Holders [Member]                
Preferred Stock, Shares Outstanding (in shares)       95,226   95,226    
Series A Preferred Stock [Member] | Other Holders [Member]                
Preferred Stock, Convertible, Conversion Ratio       0.046   0.046    
Preferred Stock, Shares Outstanding (in shares)       95,226   95,226    
Series C Preferred Stock [Member]                
Preferred Stock, Shares Authorized (in shares)       300,000 300,000 300,000   300,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.01     $ 0.01 $ 0.01 $ 0.01    
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares               $ 1
Preferred Stock, Shares Outstanding (in shares)       231,944 231,944 231,944    
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares       $ 10 $ 10 $ 10   $ 10
Preferred Share Purchase Right [Member]                
Stock Dividends, Shares (in shares) 1              
Preferred Unit, Convertible, Conversion Ratio 0.01              
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares $ 7              
Preferred Stock, Exercisable Period (Day) 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 Stock, Convertible, Conversion Ratio 1              
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              
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%        
General Partners' Capital Account, Units Outstanding (in shares)       16,688,167   16,688,167