Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 222.0	$ 199.6	$ 643.4	$ 574.0
Cost of sales	177.4	158.3	515.1	455.0
Gross margin	44.6	41.3	128.3	119.0
Operating expenses	41.1	38.2	123.2	113.3
Operating income	3.5	3.1	5.1	5.7
Interest expense, net	1.8	0.9	4.6	2.2
Income from continuing operations before income taxes	1.7	2.2	0.5	3.5
Provision for (benefit from) income taxes	0.5	0.9	(0.4)	0.8
Income from continuing operations	1.2	1.3	0.9	2.7
Income from discontinued operations, net of taxes		0.1
Net income	$ 1.2	$ 1.4	$ 0.9	$ 2.7
Income from continuing operations per share - basic and diluted	$ 0.05	$ 0.05	$ 0.03	$ 0.10
Net income per share - basic and diluted	$ 0.05	$ 0.05	$ 0.03	$ 0.10
Weighted average shares outstanding:
Basic and diluted shares outstanding	25.1	24.9	25.1	24.8