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Fair value measurements (Details Narrative) - USD ($)
3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Fair Value Disclosures [Abstract]      
Investment in equity securities $ 5,000,000 $ 5,000,000  
Leasehold improvement property and equipment     $ 1,200,000
Operating lease right-of-use asset     $ 800,000
Impairment expense of goodwill $ 0