Commitments and Contingencies - Legal (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Other commitments
Shareholders (as a percent)	5.00%
Inventory material
Other commitments
Purchase commitment	$ 5.2
Other supplier commitments | Inventory material
Other commitments
Purchase commitment	4.1
Supplier two | Inventory material
Other commitments
Purchase commitment	2.0
Supplier two | Tests
Other commitments
Purchase commitment	8.1
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