Commitments and Contingencies (Legal) (Details) $ in Millions			1 Months Ended
	Feb. 17, 2016	Jun. 02, 2015 USD ($)	Aug. 31, 2015 USD ($)	Nov. 30, 2013 item	Mar. 31, 2016 lawsuit	Dec. 31, 2015 USD ($)	Jan. 31, 2015 USD ($)
Inventory Material
Other commitments
Purchase commitment						$ 12.2
Tests
Other commitments
Purchase commitment							$ 5.1
Supplier One | Inventory Material
Other commitments
Purchase commitment						12.2
Supplier, Aggregate of Other | Inventory Material
Other commitments
Purchase commitment						$ 1.5
Patent infringement
Other commitments
Number of judgements appealed | item				3
Third-party payer
Other commitments
Amount sought		$ 1.9
Settlement amount			$ 1.2
Subsequent Event | IPO claims
Other commitments
Shareholders (as a percent)	5.00%
Number of purported class action lawsuits filed | lawsuit					2