CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Operating activities:
Net loss	$ (22.2)	$ (16.2)
Loss from discontinued operations	0.0	1.7
Loss from continuing operations	(22.2)	(14.5)
Adjustments to reconcile loss from continuing operations to net cash used in operating activities from continuing operations:
Depreciation and amortization	6.1	6.9
Stock-based compensation	1.5	2.0
Deferred income taxes	1.2	1.8
Amortization of deferred financing costs	0.4	0.5
Amortization of discount on Senior Secured Notes	0.2	0.3
Provision for doubtful accounts	0.3	0.1
Litigation related charges	1.7	0.0
Provision for non-cash restructuring charges	3.0	0.0
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(4.0)	10.1
Inventoried costs	(1.6)	(7.5)
Prepaid expenses and other assets	0.1	(1.5)
Accounts payable	(8.8)	(6.8)
Accrued compensation	(4.2)	(7.0)
Accrued expenses	(3.1)	(3.1)
Advance payments received on contracts	1.5	1.7
Accrued interest	7.9	10.9
Billings in excess of costs and earnings on uncompleted contracts	6.7	5.3
Income tax receivable and payable	0.4	0.3
Other liabilities	1.4	(2.3)
Net cash used in operating activities from continuing operations	(11.5)	(2.8)
Investing activities:
Change in restricted cash	0.0	3.8
Capital expenditures	(2.1)	(1.9)
Net cash provided by (used in) investing activities from continuing operations	(2.1)	1.9
Financing activities:
Repayment of debt	(0.3)	(0.2)
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan	1.2	1.7
Net cash provided by financing activities from continuing operations	0.9	1.5
Net cash flows of continuing operations	(12.7)	0.6
Net operating cash flows of discontinued operations	(0.4)	(0.7)
Net investing cash flows of discontinued operations	4.7	(0.3)
Effect of exchange rate changes on cash and cash equivalents	0.0	(0.4)
Net decrease in cash and cash equivalents	(8.4)	(0.8)
Cash and cash equivalents at beginning of period	28.5	33.5
Cash and cash equivalents at end of period	$ 20.1	$ 32.7