Business combinations (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
	Aug. 01, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 01, 2019
Assets (liabilities) acquired:
Goodwill			$ 9,632	$ 10,460
Total revenue			110,556	86,377	$ 56,734
Net loss			(57,688)	(31,530)	(40,796)
Revenue (unaudited)					57,597
Pre-tax loss (unaudited)					(38,636)
UmanDiagnostics AB Acquisition
Fair value of consideration transferred:
Common stock shares consideration	191,152
Common stock	$ 5,500
Capital stock shares outstanding, percent	95.00%					5.00%
Cash and stock paid	$ 21,217
Cash and cash equivalents acquired	1,221
Cash	15,700
Purchase price, net	19,996
Assets (liabilities) acquired:
Accounts receivable	638
Inventory	1,680
Prepaids and other current assets	114
Property and equipment	33
Intangibles	13,450
Goodwill	8,111
Accounts payable	(20)
Accrued expense and other current liabilities	(871)
Deferred tax liabilities	(3,139)
Total	$ 19,996
Total revenue		$ 1,100	1,800	1,500
Net loss			100	100
Transaction costs			$ 0	$ 0	$ 1,900
UmanDiagnostics AB Acquisition | Maximum
Assets (liabilities) acquired:
Net loss		$ 100