Summary of Significant Accounting Policies - 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
Revenue	$ 11,106	$ 8,277	$ 19,412	$ 13,820
Americas
Revenue Recognition
Revenue	9,470	5,815	15,538	10,489
Europe, Middle East and Africa
Revenue Recognition
Revenue	1,245	1,725	2,601	2,171
Asia Pacific
Revenue Recognition
Revenue	391	737	1,273	1,160
Product and service revenue
Revenue Recognition
Revenue	10,608	7,915	18,637	13,272
Product and service revenue | Government
Revenue Recognition
Revenue	7,002	5,279	11,719	8,513
Product and service revenue | Pharmaceutical/Biotechnology
Revenue Recognition
Revenue	3,577	2,609	6,705	4,709
Product and service revenue | Academia
Revenue Recognition
Revenue	29	27	213	50
Product and service revenue | Handheld
Revenue Recognition
Revenue	6,938	5,278	11,408	8,518
Product and service revenue | Desktop
Revenue Recognition
Revenue	3,670	2,637	7,229	4,754
Device sales
Revenue Recognition
Revenue	7,755	6,181	13,287	10,092
Consumables and service
Revenue Recognition
Revenue	2,853	1,734	5,350	3,180
License and contract revenue
Revenue Recognition
Revenue	$ 498	$ 362	$ 775	$ 548