Cash and cash equivalents (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Cash and cash equivalents
Bank accounts	$ 62,009,301	$ 64,311,264
Short-term deposits	61,779,089	35,038,857
Total cash and cash equivalents	123,788,390	99,350,121
United States dollar
Cash and cash equivalents
Bank accounts	34,460,275	39,094,067
Short-term deposits	54,944,598	31,908,220
Cayman Islands dollar
Cash and cash equivalents
Bank accounts	15,511,230	17,499,492
Short-term deposits	6,834,491	3,130,637
Bahamian dollar
Cash and cash equivalents
Bank accounts	$ 12,037,796	$ 7,717,705