Goodwill and Acquired Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Rollforward of goodwill balance
Balance as of beginning of period			$ 9,353
Cumulative translation adjustment			37
Balance as of end of period	$ 9,390		9,390		$ 9,353
Purchased intangible assets
Gross Carrying Value	16,400		16,400		16,400
Accumulated Amortization	(3,049)		(3,049)		(1,991)
Cumulative Translation Adjustment	(41)		(41)		(102)
Net Carrying Value	13,310		13,310		$ 14,307
Amortization expense	500	$ 100		$ 300
Estimated amortization expense
Remainder of 2020	1,052		1,052
2021	2,013		2,013
2022	1,930		1,930
2023	1,848		1,848
2024	1,733		1,733
Thereafter	4,734		4,734
Estimated Amortization Expenses	13,310		$ 13,310
UmanDiagnostics AB Acquisition
Purchased intangible assets
Estimated Useful Life			8 years 4 months 24 days
Goodwill acquired			$ 13,500
Developed technology
Purchased intangible assets
Estimated Useful Life			7 years		7 years
Gross Carrying Value	1,650		$ 1,650		$ 1,650
Accumulated Amortization	(889)		(889)		(737)
Net Carrying Value	761		$ 761		$ 913
Weighted average life remaining			4 years 7 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		$ 1,360
Accumulated Amortization	(521)		(521)		(421)
Cumulative Translation Adjustment					(1)
Net Carrying Value	839		$ 839		$ 938
Weighted average life remaining			7 years 6 months 29 days		8 years 29 days
Customer relationships | UmanDiagnostics AB Acquisition
Purchased intangible assets
Goodwill acquired			$ 100
Trade names
Purchased intangible assets
Estimated Useful Life			3 years		3 years
Gross Carrying Value	50		$ 50		$ 50
Accumulated Amortization	(40)		(40)		(32)
Net Carrying Value	10		$ 10		$ 18
Weighted average life remaining			7 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		$ 13,000
Accumulated Amortization	(1,531)		(1,531)		(767)
Cumulative Translation Adjustment	(40)		(40)		(99)
Net Carrying Value	11,429		$ 11,429		$ 12,134
Weighted average life remaining			7 years 6 months		8 years
Know How | UmanDiagnostics AB Acquisition
Purchased intangible assets
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		$ 340
Accumulated Amortization	(68)		(68)		(34)
Cumulative Translation Adjustment	(1)		(1)		(2)
Net Carrying Value	$ 271		$ 271		$ 304
Weighted average life remaining			4 years 6 months		5 years
Noncompete Agreements | UmanDiagnostics AB Acquisition
Purchased intangible assets
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