Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net sales	$ 223.4	$ 198.7	$ 421.4	$ 374.4
Cost of sales	178.3	156.5	337.6	296.7
Gross margin	45.1	42.2	83.8	77.7
Operating expenses	43.0	38.1	82.2	75.1
Operating income	2.1	4.1	1.6	2.6
Interest expense, net	1.7	0.7	2.8	1.3
Income (loss) from continuing operations before income taxes	0.4	3.4	(1.2)	1.3
Provision for (benefit from) income taxes	0.2	1.1	(0.9)	(0.1)
Income (loss) from continuing operations	0.2	2.3	(0.3)	1.4
Loss from discontinued operations, net of taxes		(0.1)		(0.1)
Net income (loss)	$ 0.2	$ 2.2	$ (0.3)	$ 1.3
Income (loss) from continuing operations per share - basic and diluted	$ 0.01	$ 0.09	$ (0.01)	$ 0.05
Net income (loss) per share - basic and diluted	$ 0.01	$ 0.09	$ (0.01)	$ 0.05
Weighted average shares outstanding:
Basic and diluted shares outstanding	25.2	24.9	25.2	24.8