Summary of significant accounting policies - Assets by Geographic Location (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	$ 75,461,415	$ 65,744,930
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	47,935,433	38,401,665
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	15,027,362	17,850,709
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	1,625,994	528,068
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	$ 10,872,626	$ 8,964,488