Revenue recognition - Summarizes the activity under WP2 (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 29, 2020	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenue		$ 23,500	$ 25,371	$ 53,052	$ 52,580
Grant revenue
Disaggregation of Revenue [Line Items]
Total revenue		75	$ 942	75	$ 3,233
RADx WP2
Disaggregation of Revenue [Line Items]
Total WP2 grant amount	$ 18,200			18,200
RADx WP2 | Grant revenue
Disaggregation of Revenue [Line Items]
Total revenue		$ 0		9,576		$ 9,576
Proceeds used for assets				8,624		8,104
Total recognized				18,200		17,680
Total cash received				18,200		17,680
Proceeds received				18,200		17,680
Proceeds reasonably assured						520
Total WP2 grant amount				$ 18,200		$ 18,200