Accounting policies (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Foreign Currency Transaction Gain (Loss), before Tax [Abstract]
Foreign Currency Transaction Gain (Loss), before Tax	$ (108)	$ 16,843
Bahamas [Member]
Deposits held in foreign bank	8,800,000
Certificates of Deposit [Member]
Short term deposits	$ 8,500,000		$ 8,500,000