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Summary of Significant Accounting Policies -Stock-based Payments And Directors' Fees (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Jun. 30, 2023
Summary Of Significant Accounting Policies [Line Items]    
Number of shares available for distribution under the Director Plan (in shares) 35,000  
Percentage of shares vesting 5.00%  
Board of Directors | Restricted stock    
Summary Of Significant Accounting Policies [Line Items]    
Shares granted (in shares) 2,000  
Independent Directors    
Summary Of Significant Accounting Policies [Line Items]    
Annual Retainer Received In Shares And Cash Amount $ 140  
Percentage of annual retainer received in shares (in percent) 50.00%  
Percentage of annual retainer received in cash (in percent) 50.00%  
Independent Directors | Maximum    
Summary Of Significant Accounting Policies [Line Items]    
Percentage of annual retainer received in cash (in percent) 100.00%  
Heads of Compensation and Corporate Governance Committees    
Summary Of Significant Accounting Policies [Line Items]    
Annual Retainer Received In Shares And Cash Amount $ 15  
Percentage of annual retainer received in cash (in percent) 100.00%  
Audit Committee    
Summary Of Significant Accounting Policies [Line Items]    
Annual Retainer Received In Shares And Cash Amount $ 20  
Percentage of annual retainer received in cash (in percent) 100.00%  
Lead Director    
Summary Of Significant Accounting Policies [Line Items]    
Annual Retainer Received In Shares And Cash Amount   $ 20
Percentage of annual retainer received in cash (in percent)   100.00%
Special Committee    
Summary Of Significant Accounting Policies [Line Items]    
Annual Retainer Received In Shares And Cash Amount $ 20  
Lead Director of Special Committee    
Summary Of Significant Accounting Policies [Line Items]    
Annual Retainer Received In Shares And Cash Amount 30  
Annual retainer received in stock payment $ 15  
Amended and restated management agreement | Thetis Asset Management LLC    
Summary Of Significant Accounting Policies [Line Items]    
Period of common shares held as base management fee (at least) (in years) 3 years