Revenue recognition - Disaggregated revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue recognition
Total revenue	$ 23,500	$ 25,371	$ 53,052	$ 52,580
Product revenue
Revenue recognition
Total revenue	14,785	18,676	35,441	36,924
Product revenue | NA
Revenue recognition
Total revenue	7,192	10,934	18,190	21,601
Product revenue | EMEA
Revenue recognition
Total revenue	5,715	4,881	12,187	11,207
Product revenue | Asia Pacific
Revenue recognition
Total revenue	1,878	2,861	5,064	4,116
Instruments
Revenue recognition
Total revenue	5,604	5,838	11,826	12,799
Instruments | NA
Revenue recognition
Total revenue	2,473	2,122	4,638	5,878
Instruments | EMEA
Revenue recognition
Total revenue	2,127	1,630	4,173	4,463
Instruments | Asia Pacific
Revenue recognition
Total revenue	1,004	2,086	3,015	2,458
Consumable and other products
Revenue recognition
Total revenue	9,181	12,838	23,615	24,125
Consumable and other products | NA
Revenue recognition
Total revenue	4,719	8,812	13,552	15,723
Consumable and other products | EMEA
Revenue recognition
Total revenue	3,588	3,251	8,014	6,744
Consumable and other products | Asia Pacific
Revenue recognition
Total revenue	874	775	2,049	1,658
Service and other revenue
Revenue recognition
Total revenue	8,548	5,648	17,358	12,057
Service and other revenue | NA
Revenue recognition
Total revenue	7,148	4,177	14,811	9,162
Service and other revenue | EMEA
Revenue recognition
Total revenue	1,241	1,393	2,242	2,743
Service and other revenue | Asia Pacific
Revenue recognition
Total revenue	159	78	305	152
Service-type warranties
Revenue recognition
Total revenue	2,132	1,607	4,166	3,078
Service-type warranties | NA
Revenue recognition
Total revenue	1,320	1,098	2,603	2,069
Service-type warranties | EMEA
Revenue recognition
Total revenue	688	458	1,347	896
Service-type warranties | Asia Pacific
Revenue recognition
Total revenue	124	51	216	113
Research services
Revenue recognition
Total revenue	5,835	3,518	12,075	7,816
Research services | NA
Revenue recognition
Total revenue	5,511	2,728	11,607	6,286
Research services | EMEA
Revenue recognition
Total revenue	316	763	447	1,491
Research services | Asia Pacific
Revenue recognition
Total revenue	8	27	21	39
Other services
Revenue recognition
Total revenue	581	523	1,117	1,163
Other services | NA
Revenue recognition
Total revenue	317	351	601	807
Other services | EMEA
Revenue recognition
Total revenue	237	172	448	356
Other services | Asia Pacific
Revenue recognition
Total revenue	27		68
Collaboration and license revenue
Revenue recognition
Total revenue	92	105	178	366
Collaboration and license revenue | NA
Revenue recognition
Total revenue	43	41	43	228
Collaboration and license revenue | EMEA
Revenue recognition
Total revenue	$ 49	$ 64	83	$ 138
Collaboration and license revenue | Asia Pacific
Revenue recognition
Total revenue			$ 52