Cost of revenues and general and administrative expenses - General and administrative expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	$ 21,070,234	$ 18,350,359
Employee costs [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	11,209,635	9,562,125
Insurance [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	2,067,625	1,813,026
Professional fees [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	1,760,279	1,611,616
Directors' fees and expenses [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	991,592	851,775
Office Rent [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	793,380	735,737
Depreciation [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	163,714	140,140
Amortization of intangibles [Member]
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	582,778	746,667
Other [Member].
Cost of revenues and general and administrative expenses [Line Items]
General and Administrative Expense	$ 3,501,231	$ 2,889,273