v3.26.1
Income taxes (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income taxes        
U.S. Statutory federal income tax rate 21.00% 21.00% 21.00% 21.00%
State income taxes, net of federal income tax 5.00% 5.00% 5.00% 5.00%
Change in valuation allowance (26.00%) (26.00%) (26.00%) (26.00%)
Effect income tax rate 0.00% 0.00% 0.00% 0.00%