Revenue from Contracts with Customers - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 24,999	$ 34,592	$ 48,084	$ 52,656
Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	5,488	6,035	10,162	10,505
Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	10,281	9,194	19,638	17,786
In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,521	1,835	4,687	3,274
Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	18,290	17,064	34,487	31,565
Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,094	1,246	3,942	2,510
Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	20,384	18,310	38,429	34,075
Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	4,615	16,282	9,655	18,581
Americas
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	17,005	27,341	32,833	39,552
Americas | Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	3,131	3,029	5,817	5,843
Americas | Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	6,801	6,537	12,961	12,120
Americas | In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	918	697	1,599	1,178
Americas | Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	10,850	10,263	20,377	19,141
Americas | Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,540	796	2,801	1,830
Americas | Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	12,390	11,059	23,178	20,971
Americas | Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	4,615	16,282	9,655	18,581
Europe and Middle East
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	6,392	5,237	12,150	9,653
Europe and Middle East | Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,555	1,653	3,040	2,840
Europe and Middle East | Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	2,872	2,067	5,249	4,195
Europe and Middle East | In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,516	1,105	2,913	2,021
Europe and Middle East | Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	5,943	4,825	11,202	9,056
Europe and Middle East | Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	449	412	948	597
Europe and Middle East | Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	6,392	5,237	12,150	9,653
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	1,602	2,014	3,101	3,451
Asia Pacific | Instruments
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	802	1,353	1,305	1,822
Asia Pacific | Consumables
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	608	590	1,428	1,471
Asia Pacific | In vitro diagnostic kits
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	87	33	175	75
Asia Pacific | Total product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,497	1,976	2,908	3,368
Asia Pacific | Service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	105	38	193	83
Asia Pacific | Total product and service revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,602	2,014	3,101	3,451
Asia Pacific | Collaboration revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0