Segment information - Property, plant and equipment, net by major geographic region (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Segment information
Property, plant and equipment, net	$ 55,151,758	$ 52,432,282
Cayman Islands
Segment information
Property, plant and equipment, net	32,530,208	31,882,111
Bahamas
Segment information
Property, plant and equipment, net	16,201,134	17,903,191
United States
Segment information
Property, plant and equipment, net	$ 6,420,416	$ 2,646,980