Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 212,700,000	$ 215,700,000	$ 607,700,000	$ 631,600,000
Cost of sales	170,000,000.0	171,000,000.0	485,400,000	505,200,000
Gross margin	42,700,000	44,700,000	122,300,000	126,400,000
Operating expenses	35,800,000	41,400,000	109,500,000	122,000,000.0
Goodwill impairment			9,500,000
Restucturing charge	1,500		1,500,000
Operating income	6,900,000	3,300,000	1,800,000	4,400,000
Interest expense, net	800,000	1,700,000	3,000,000.0	5,200,000
Income (loss) from operations before income taxes	6,100,000	1,600,000	(1,200,000)	(800,000)
Income tax expense				11,100,000
Income (loss) from continuing operations	6,100,000	1,600,000	(1,200,000)	(11,900,000)
Net income (loss)	$ 6,100,000	$ 1,600,000	$ (1,200,000)	$ (11,900,000)
Earnings (loss) per share:
Earnings (loss) from continuing operations per share- basic	$ 0.24	$ 0.06	$ (0.04)	$ (0.47)
Net earnings (loss) per share - basic	0.24	0.06	(0.04)	(0.47)
Earnings (loss) from continuing operations per share- diluted	0.24	0.06	(0.04)	(0.47)
Net income (loss) per share- diluted	$ 0.24	$ 0.06	$ (0.04)	$ (0.47)
Weighted average shares outstanding:
Basic shares outstanding	26.0	25.5	26.0	25.4
Diluted shares outstanding	26.2	25.6	26.0	25.4