CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jun. 25, 2017	Jul. 01, 2018	Jun. 25, 2017
Total revenues	$ 151.2	$ 147.9	$ 294.2	$ 279.9
Total costs	111.9	110.4	214.1	206.3
Gross profit	39.3	37.5	80.1	73.6
Selling, general and administrative expenses	30.1	31.9	59.9	61.9
Research and development expenses	3.6	4.1	7.2	8.5
Restructuring expenses and other	3.0	0.0	3.4	0.3
Operating income from continuing operations	2.6	1.5	9.6	2.9
Other income (expense):
Interest expense, net	(5.7)	(7.2)	(10.8)	(15.4)
Loss on extinguishment of debt	0.0	0.0	0.0	(2.1)
Other income (expense), net	(0.6)	0.1	(0.3)	0.3
Total other expense, net	(6.3)	(7.1)	(11.1)	(17.2)
Loss from continuing operations before income taxes	(3.7)	(5.6)	(1.5)	(14.3)
Provision for income taxes from continuing operations	0.1	1.3	1.0	2.7
Loss from continuing operations	(3.8)	(6.9)	(2.5)	(17.0)
Discontinued operations
Income (loss) from operations of discontinued components	(5.7)	1.3	(9.6)	1.6
Income tax benefit (expense)	1.8	(0.6)	2.2	(0.8)
Income (loss) from discontinued operations	(3.9)	0.7	(7.4)	0.8
Net loss	$ (7.7)	$ (6.2)	$ (9.9)	$ (16.2)
Basic and diluted loss per common share:
Loss from continuing operations (in dollars per share)	$ (0.04)	$ (0.08)	$ (0.02)	$ (0.21)
Income from discontinued operations (in dollars per share)	(0.03)	0.01	(0.08)	0.01
Net loss per common share (in dollars per share)	$ (0.07)	$ (0.07)	$ (0.10)	$ (0.20)
Weighted average common shares outstanding:
Basic and diluted weighted average common shares outstanding (in shares)	103.7	86.6	103.7	82.0
Comprehensive Loss
Net loss	$ (7.7)	$ (6.2)	$ (9.9)	$ (16.2)
Change in cumulative translation adjustment	0.1	0.0	0.0	0.1
Comprehensive loss	(7.6)	(6.2)	(9.9)	(16.1)
Service
Total revenues	47.0	53.8	93.0	103.0
Total costs	33.2	39.1	66.1	74.1
Product
Total revenues	104.2	94.1	201.2	176.9
Total costs	$ 78.7	$ 71.3	$ 148.0	$ 132.2