Income taxes - Components of Deferred Taxes (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforward	$ 20,536,344	$ 12,816,395
Capitalized research and development		1,951
Intangible assets	26,842
Accrued expenses	17,779
Lease liability - ASC 842	128,337
Gross deferred tax assets	20,709,302	12,818,346
Valuation allowance	(19,676,794)	(12,661,874)
Total deferred tax assets	1,032,508	156,472
Deferred tax liabilities:
Fixed assets	(1,692)	(2,050)
Stock Compensation	(908,322)	(154,422)
Right of Use Asset - ASC 842	(122,494)
Total deferred tax liabilities	$ (1,032,508)	$ (156,472)