Goodwill and Acquired Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Rollforward of goodwill balance
Balance as of beginning of period	$ 1,308
Goodwill acquired	8,111
Cumulative translation adjustment	(66)
Balance as of end of period	9,353	$ 1,308
Purchased intangible assets
Gross Carrying Value	16,400	2,950
Accumulated Amortization	(1,991)	(602)
Cumulative Translation Adjustment	(102)
Net Carrying Value	14,307	2,348
Amortization expense	1,400	$ 600	$ 0
Estimated amortization expense
2020	2,110
2021	2,013
2022	1,930
2023	1,848
2024	1,733
Thereafter	4,673
Estimated Amortization Expenses	14,307
UmanDiagnostics AB Acquisition
Rollforward of goodwill balance
Goodwill acquired	$ 13,500
Purchased intangible assets
Estimated Useful Life	8 years 4 months 24 days
Developed technology
Purchased intangible assets
Estimated Useful Life	7 years	7 years
Gross Carrying Value	$ 1,650	$ 1,650
Accumulated Amortization	(737)	(378)
Net Carrying Value	$ 913	$ 1,272
Weighted average life remaining	5 years 1 month 2 days	6 years 29 days
Customer relationships
Purchased intangible assets
Estimated Useful Life	8 years 6 months	10 years
Gross Carrying Value	$ 1,360	$ 1,250
Accumulated Amortization	(421)	(209)
Cumulative Translation Adjustment	(1)
Net Carrying Value	$ 938	$ 1,041
Weighted average life remaining	8 years 29 days	9 years 29 days
Customer relationships | UmanDiagnostics AB Acquisition
Rollforward of goodwill balance
Goodwill acquired	$ 100
Trade names
Purchased intangible assets
Estimated Useful Life	3 years	3 years
Gross Carrying Value	$ 50	$ 50
Accumulated Amortization	(32)	(15)
Net Carrying Value	$ 18	$ 35
Weighted average life remaining	1 year 1 month 2 days	2 years 29 days
Know How
Purchased intangible assets
Estimated Useful Life	8 years 6 months
Gross Carrying Value	$ 13,000
Accumulated Amortization	(767)
Cumulative Translation Adjustment	(99)
Net Carrying Value	$ 12,134
Weighted average life remaining	8 years
Know How | UmanDiagnostics AB Acquisition
Rollforward of goodwill balance
Goodwill acquired	$ 13,000
Noncompete Agreements
Purchased intangible assets
Estimated Useful Life	5 years 6 months
Gross Carrying Value	$ 340
Accumulated Amortization	(34)
Cumulative Translation Adjustment	(2)
Net Carrying Value	$ 304
Weighted average life remaining	5 years
Noncompete Agreements | UmanDiagnostics AB Acquisition
Rollforward of goodwill balance
Goodwill acquired	$ 400
Maximum | Customer relationships
Purchased intangible assets
Estimated Useful Life	10 years
Minimum | Customer relationships
Purchased intangible assets
Estimated Useful Life	8 years 6 months