Revenue from contracts with customers (Summary of Changes in Deferred Revenue) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)
Revenue Recognition and Deferred Revenue [Abstract]
Balance at December 31, 2019	$ 9,808
Acquired deferrals from Curetis	829,275
Revenue recognized in the current period from the amounts in the beginning balance
Revenue recognized in the current period from the amounts acquired from Curetis	(870,114)
Effect of foreign exchange rates	40,839
Balance at December 31, 2020	$ 9,808