Revenue from Contracts with Customers - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 30,345	$ 24,999	$ 58,033	$ 48,084
Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	4,940	5,488	9,258	10,162
Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	11,774	10,281	23,920	19,638
In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,614	2,521	4,928	4,687
Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	19,328	18,290	38,106	34,487
Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	3,042	2,094	5,614	3,942
Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	22,370	20,384	43,720	38,429
Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	7,975	4,615	14,313	9,655
Americas
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	22,578	17,005	41,505	32,833
Americas | Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	3,596	3,131	5,786	5,817
Americas | Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	8,193	6,801	16,368	12,961
Americas | In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	647	918	1,076	1,599
Americas | Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	12,436	10,850	23,230	20,377
Americas | Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,167	1,540	3,962	2,801
Americas | Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	14,603	12,390	27,192	23,178
Americas | Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	7,975	4,615	14,313	9,655
Europe and Middle East
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	6,308	6,392	13,508	12,150
Europe and Middle East | Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	960	1,555	2,490	3,040
Europe and Middle East | Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,800	2,872	6,044	5,249
Europe and Middle East | In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,866	1,516	3,679	2,913
Europe and Middle East | Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	5,626	5,943	12,213	11,202
Europe and Middle East | Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	682	449	1,295	948
Europe and Middle East | Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	6,308	6,392	13,508	12,150
Europe and Middle East | Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	0	0	0	0
Asia Pacific
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,459	1,602	3,020	3,101
Asia Pacific | Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	384	802	982	1,305
Asia Pacific | Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	781	608	1,508	1,428
Asia Pacific | In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	101	87	173	175
Asia Pacific | Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,266	1,497	2,663	2,908
Asia Pacific | Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	193	105	357	193
Asia Pacific | Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,459	1,602	3,020	3,101
Asia Pacific | Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0