v3.26.1
Summary of significant accounting policies (Details - Assumptions) - Non Public Warrants [Member]
6 Months Ended
Jun. 30, 2026
Measurement Input, Expected Term [Member]  
Business Combination [Line Items]  
Assumptions used 1.00
Measurement Input, Share Price [Member]  
Business Combination [Line Items]  
Assumptions used 4.33
Measurement Input, Quoted Price [Member]  
Business Combination [Line Items]  
Assumptions used 6.00
Measurement Input, Risk Free Interest Rate [Member]  
Business Combination [Line Items]  
Assumptions used 3.98%
Measurement Input, Price Volatility [Member]  
Business Combination [Line Items]  
Assumptions used 116.38%