Income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Taxation (charge) credit at the federal and state statutory rate	$ (85,555)	$ 478,522
State taxation	(29,345)
Prior year over provision		250,000
Foreign taxation		(5,309)
Permanent differences	235,762	(271,310)
Foreign tax rate differential		(100)
Net operating loss utilized	(233,082)	5,594
Valuation allowance		(176,494)
Net future tax asset	$ (112,220)	$ 280,903