Cash and cash equivalents (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Cash and cash equivalents
Bank accounts	$ 64,311,264	$ 30,709,612
Short-term deposits	35,038,857	11,912,286
Total cash and cash equivalents	99,350,121	42,621,898
United States dollar
Cash and cash equivalents
Bank accounts	39,094,067	15,857,612
Short-term deposits	31,908,220	8,861,606
Cayman Islands dollar
Cash and cash equivalents
Bank accounts	17,499,492	11,826,102
Short-term deposits	3,130,637	3,050,680
Bahamian dollar
Cash and cash equivalents
Bank accounts	$ 7,717,705	$ 3,025,898