Annual report pursuant to Section 13 and 15(d)

Supplemental Financial Information (Details)

v3.7.0.1
Supplemental Financial Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Selected operating expenses      
Research and development costs $ 12.7 $ 11.4 $ 10.8
Advertising costs $ 4.2 $ 2.8 $ 3.8