Summary of significant accounting policies (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Cost	$ 17,531,000	$ 17,531,000
Accumulated Amortization	(811,281)	(1,899,199)
Impairment		(750,596)
Effect of foreign exchange rates	949,932	1,699,758
Net Balance	15,656,651	16,580,963
Trademarks And Trade Names [Member] | AdvanDx [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	461,000	461,000
Accumulated Amortization		(217,413)
Impairment		(243,587)
Effect of foreign exchange rates
Net Balance
Trademarks And Trade Names [Member] | Curetis N.V [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,768,000	1,768,000
Accumulated Amortization	(187,484)	(147,161)
Impairment
Effect of foreign exchange rates	106,815	194,119
Net Balance	1,687,331	1,814,958
Developed Technology [Member] | AdvanDx [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	458,000	458,000
Accumulated Amortization		(308,526)
Impairment		(149,474)
Effect of foreign exchange rates
Net Balance
Customer/distributor relationships [Member] | AdvanDx [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,094,000	1,094,000
Accumulated Amortization		(736,465)
Impairment		(357,535)
Effect of foreign exchange rates
Net Balance
Distributor Relationships [Member] | Curetis N.V [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	2,362,000	2,362,000
Accumulated Amortization	(166,984)	(131,070)
Impairment
Effect of foreign exchange rates	142,700	259,336
Net Balance	2,337,716	2,490,266
A50 - Developed technology [Member] | Curetis N.V [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	349,000	349,000
Accumulated Amortization	(52,876)	(41,504)
Impairment
Effect of foreign exchange rates	21,086	38,319
Net Balance	317,210	345,815
Ares - Developed technology [Member] | Curetis N.V [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	5,333,000	5,333,000
Accumulated Amortization	(403,937)	(317,060)
Impairment
Effect of foreign exchange rates	322,190	585,536
Net Balance	5,251,253	5,601,476
A30 - Acquired in-process research & development [Member] | Curetis N.V [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	5,706,000	5,706,000
Accumulated Amortization
Impairment
Effect of foreign exchange rates	357,141	622,448
Net Balance	$ 6,063,141	$ 6,328,448