Revenue from contracts with customers (Summary of Changes in Deferred Revenue) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue Recognition and Deferred Revenue [Abstract]
Balance at December 31, 2020	$ 9,808	$ 9,808
Acquired deferrals from Curetis		829,275
Revenue recognized in the period from the amounts acquired from Curetis		(870,114)
Effect of foreign exchange rates		40,839
New deferrals, net of amounts recognized in the current period
Amounts returned to customers	(9,808)
Balance at December 31, 2021		$ 9,808