Revenue from contracts with customers (Schedule of Revenues by Type of Service) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 829,716	$ 616,933
Product sales [Member]
Disaggregation of Revenue [Line Items]
Total revenue	613,918	366,933
Laboratory services [Member]
Disaggregation of Revenue [Line Items]
Total revenue	97,726
Collaborations revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 118,072	$ 250,000