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Income Taxes (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Taxes.        
Income tax benefit attributable to noncontrolling interest $ 22,000 $ 298,000 $ 0  
Federal statutory rate 21.00% 21.00% 21.00%  
Income tax receivable $ 506,000      
Accrued income taxes 1,474,000      
Change in the valuation allowance 3,000      
Liability for uncertain tax positions 35,000 $ 35,000 $ 42,000 $ 53,000
Unrecognized tax benefits 35,000      
Unrecognized tax benefits, interest and penalties 0 $ 1,000 $ 5,000  
Domestic country        
Income Taxes.        
Net operating loss to carry forward 6,528,000      
State And Local Jurisdiction        
Income Taxes.        
Net operating loss to carry forward $ 1,229,000