CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 26, 2017	Mar. 27, 2016
Income Statement [Abstract]
Service revenues	$ 85.0	$ 82.6
Product sales	82.8	70.4
Total revenues	167.8	153.0
Cost of service revenues	61.8	60.3
Cost of product sales	60.9	56.8
Total costs	122.7	117.1
Gross profit	45.1	35.9
Selling, general and administrative expenses	38.7	37.7
Research and development expenses	4.4	2.9
Unused office space, restructuring expenses, and other	0.3	5.5
Operating income (loss) from continuing operations	1.7	(10.2)
Other income (expense):
Interest expense, net	(8.2)	(8.7)
Loss on extinguishment of debt	(2.1)	0.0
Other income, net	0.2	0.3
Total other expense, net	(10.1)	(8.4)
Loss from continuing operations before income taxes	(8.4)	(18.6)
Provision for income taxes from continuing operations	1.5	3.6
Loss from continuing operations	(9.9)	(22.2)
Discontinued operations
Loss from operations of discontinued component	(0.1)	0.0
Income tax expense	0.0	0.0
Loss from discontinued operations	(0.1)	0.0
Net loss	$ (10.0)	$ (22.2)
Basic and diluted loss per common share:
Net loss from continuing operations (in dollars per share)	$ (0.13)	$ (0.37)
Net loss from discontinued operations (in dollars per share)	0.00	0.00
Net loss per common share (in dollars per share)	$ (0.13)	$ (0.37)
Weighted average common shares outstanding:
Basic and diluted weighted average shares outstanding (shares)	77.3	59.6
Comprehensive Loss
Net loss	$ (10.0)	$ (22.2)
Change in cumulative translation adjustment	0.1	0.0
Comprehensive loss	$ (9.9)	$ (22.2)