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Organization and Significant Accounting Policies - Income taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Organization and Significant Accounting Policies    
Income tax benefit $ (15) $ (16)
Required holding period 5 years  
Deferred tax liability, built in gain $ 0  
Deferred tax asset or liability 0 0
TRS    
Organization and Significant Accounting Policies    
Taxable income (loss) attributable to TRS (400) (400)
Maximum    
Organization and Significant Accounting Policies    
Income tax benefit $ 100 $ (100)