Revenue from contracts with customers (Schedule of Revenues by Type of Service) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,239,132	$ 1,056,765	$ 2,880,463	$ 2,862,083
Product sales [Member]
Disaggregation of Revenue [Line Items]
Total revenue	643,887	601,562	1,479,270	1,569,799
Laboratory services [Member]
Disaggregation of Revenue [Line Items]
Total revenue	192,753	112,892	643,602	138,884
Collaborations revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 402,492	$ 342,311	$ 757,591	$ 1,153,400