Commitments and Contingencies - Legal (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($) agreement item
Other commitments
Shareholders (as a percent)	5.00%
Number of agreements amended | agreement	1
Amended agreements with number of suppliers | item	1
Inventory material
Other commitments
Purchase commitment	$ 6.8
Other supplier commitments | Inventory material
Other commitments
Purchase commitment	4.0
Supplier two | Inventory material
Other commitments
Purchase commitment	2.0
Supplier three | Tests
Other commitments
Purchase commitment	4.5
Supplier Four | Biological Sample Processing and Storage
Other commitments
Purchase commitment	5.6
Securities related claims
Other commitments
Estimate of possible loss	1.5
Commercial general liability claims
Other commitments
Estimate of possible loss	$ 0.3