Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue	$ 226.3	$ 177.1	$ 424.3	$ 336.7
Cost of revenue	83.8	60.7	154.9	113.6
Gross profit	142.5	116.4	269.4	223.1
Operating expenses:
Research and development expenses	34.2	33.0	69.7	65.5
Selling, general and administrative expenses	80.8	75.8	164.7	142.7
Operating income	27.5	7.6	35.0	14.9
Interest expense, net	(11.1)	(5.8)	(21.2)	(10.6)
Other income, net	1.0	0.1	1.0	2.3
Income before income taxes	17.4	1.9	14.8	6.6
Income tax expense	(3.0)	(0.5)	(2.5)	(0.8)
Net income	$ 14.4	$ 1.4	$ 12.3	$ 5.8
Net income per share:
Basic (in dollars per share)	$ 0.22	$ 0.02	$ 0.19	$ 0.10
Diluted (in dollars per share)	$ 0.22	$ 0.02	$ 0.19	$ 0.09
Weighted-average number of common shares outstanding:
Basic (in shares)	64,370,791	59,844,991	63,627,231	59,601,365
Diluted (in shares)	65,578,513	61,486,325	64,970,187	61,332,451