Financial Statement Details - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Disclosure of Financial Statement Details [Abstract]
Accounts payable trade	$ 21.5	$ 19.0
Accrued tax, audit, and legal fees	2.9	2.1
Clinical trials	0.4	0.7
Accrued other including warranty	20.3	17.1
Total	$ 45.1	$ 38.9