Income taxes - Components of Deferred Taxes (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforward	$ 38,773,870	$ 32,183,004
Stock compensation	3,341,338	1,358,554
Lease liability - ASC 842	47,677	70,192
Gross deferred tax assets	42,162,885	33,611,750
Valuation allowance	(42,115,543)	(33,541,533)
Total deferred tax assets	47,342	70,217
Deferred tax liabilities:
Fixed assets	(818)	(1,130)
Right of use asset	(46,524)	(69,087)
Total deferred tax liabilities	$ (47,342)	$ (70,217)