Goodwill and Acquired Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Rollforward of goodwill balance
Balance as of beginning of period	$ 9,353
Cumulative translation adjustment	(439)
Balance as of end of period	8,914		$ 9,353
Purchased intangible assets
Gross Carrying Value	16,400		16,400
Accumulated Amortization	(2,523)		(1,991)
Cumulative Translation Adjustment	(762)		(102)
Net Carrying Value	13,115		$ 14,307
Amortization expense	500	$ 200
Estimated amortization expense
Remainder of 2020	1,578
2021	2,013
2022	1,930
2023	1,848
2024	1,733
Thereafter	4,013
Estimated Amortization Expenses	13,115
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	(815)		(737)
Net Carrying Value	$ 835		$ 913
Weighted average life remaining	4 years 10 months 2 days		5 years 1 month 2 days
Customer relationships
Purchased intangible assets
Estimated Useful Life	8 years 6 months
Gross Carrying Value	$ 1,360		$ 1,360
Accumulated Amortization	(472)		(421)
Cumulative Translation Adjustment	(6)		(1)
Net Carrying Value	$ 882		$ 938
Weighted average life remaining	7 years 9 months 29 days		8 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	(36)		(32)
Net Carrying Value	$ 14		$ 18
Weighted average life remaining	10 months 2 days		1 year 1 month 2 days
Know How
Purchased intangible assets
Estimated Useful Life	8 years 6 months		8 years 6 months
Gross Carrying Value	$ 13,000		$ 13,000
Accumulated Amortization	(1,149)		(767)
Cumulative Translation Adjustment	(738)		(99)
Net Carrying Value	$ 11,113		$ 12,134
Weighted average life remaining	7 years 9 months		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		5 years 6 months
Gross Carrying Value	$ 340		$ 340
Accumulated Amortization	(51)		(34)
Cumulative Translation Adjustment	(18)		(2)
Net Carrying Value	$ 271		$ 304
Weighted average life remaining	4 years 9 months		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		10 years
Minimum | Customer relationships
Purchased intangible assets
Estimated Useful Life	8 years 6 months		8 years 6 months