Summary of significant accounting policies - Revenues - Disaggregation by Geographic Location (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 30,501,460	$ 33,212,548
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	19,911,144	21,168,372
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	6,097,086	8,184,143
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	3,582,073	3,104,994
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 911,157	$ 755,039