Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 247.4	$ 192.0	$ 462.1	$ 395.0
Cost of sales	192.1	153.3	361.1	315.4
Gross margin	55.3	38.7	101.0	79.6
Operating expenses	39.5	34.7	76.4	73.7
Goodwill impairment				9.5
Restructuring charge		1.5		1.5
Operating income (loss)	15.8	2.5	24.6	(5.1)
Interest expense, net	0.6	0.9	1.3	2.2
Income (loss) from operations before income taxes	15.2	1.6	23.3	(7.3)
Income tax expense	0.3		0.3
Income (loss) from continuing operations	14.9	1.6	23.0	(7.3)
Net income (loss)	$ 14.9	$ 1.6	$ 23.0	$ (7.3)
Earnings (loss) per share:
Earnings (loss) from continuing operations per share- basic	$ 0.54	$ 0.06	$ 0.84	$ (0.28)
Net earnings (loss) per share - basic	0.54	0.06	0.84	(0.28)
Earnings (loss) from continuing operations per share- diluted	0.54	0.06	0.84	(0.28)
Net income (loss) per share- diluted	$ 0.54	$ 0.06	$ 0.84	$ (0.28)
Weighted average shares outstanding:
Basic shares outstanding	27.4	26.0	27.3	26.0
Diluted shares outstanding	27.5	26.2	27.5	26.0