Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 792.3	$ 812.0	$ 839.6
Cost of sales	632.9	650.0	673.1
Gross margin	159.4	162.0	166.5
Operating expenses	145.6	165.6	167.5
Gain on disposal of capital assets			(0.1)
Goodwill impairment	9.5
Restructuring charge	1.5
Operating income (loss)	2.8	(3.6)	(0.9)
Interest expense, net	3.6	6.6	6.5
Loss from continuing operations before income taxes	(0.8)	(10.2)	(7.4)
Provision for (benefit from) income taxes	0.1	11.1	(1.4)
Net loss from continuing operations	(0.9)	(21.3)	(6.0)
Net loss from discontinued operations, net of taxes of ($0.0), ($0.0) and ($0.1), respectively			(0.4)
Net loss	$ (0.9)	$ (21.3)	$ (6.4)
Net loss from continuing operations per share - basic and diluted	$ (0.03)	$ (0.84)	$ (0.24)
Net income loss from discontinued operations per share - basic and diluted			(0.02)
Net loss per share - basic and diluted	$ (0.03)	$ (0.84)	$ (0.26)
Weighted average shares outstanding:
Basic and diluted shares outstanding	26.0	25.4	25.1