CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018
Operating activities:
Net income (loss)	$ 7.4	$ (9.9)
Income (loss) from discontinued operations	2.4	(7.4)
Income (loss) from continuing operations	5.0	(2.5)
Adjustments to reconcile income (loss) from continuing operations to net cash provided by operating activities from continuing operations:
Depreciation and amortization	11.1	9.2
Amortization of lease right-of-use assets	5.4	0.0
Stock-based compensation	5.4	3.4
Deferred income taxes	(3.1)	(0.7)
Amortization of deferred financing costs	0.5	0.5
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	4.4	8.1
Unbilled receivables	8.6	(23.7)
Inventoried costs	(16.3)	0.5
Prepaid expenses and other assets	(0.4)	3.2
Operating lease liabilities	0.8	0.0
Accounts payable	3.6	6.0
Accrued expenses	0.0	(1.4)
Accrued compensation	(2.1)	3.9
Advance payments received on contracts	0.1	(0.6)
Billings in excess of costs and earnings on uncompleted contracts	2.0	(8.9)
Income tax receivable and payable	1.2	(1.0)
Other liabilities	(6.2)	5.4
Net cash provided by operating activities from continuing operations	20.0	1.4
Investing activities:
Cash paid for acquisitions, net of cash acquired	(17.6)	0.0
Capital expenditures	(9.8)	(11.0)
Proceeds from sale of assets	0.0	67.9
Net cash provided by (used in) investing activities from continuing operations	(27.4)	56.9
Financing activities:
Debt issuance costs	0.0	(0.1)
Expenses from the issuance of common stock	0.0	(1.1)
Repayment of debt	0.0	(0.5)
Payments under finance leases	(0.2)	0.0
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan	0.9	1.8
Net cash provided by financing activities from continuing operations	0.7	0.1
Net cash flows of continuing operations	(6.7)	58.4
Net operating cash flows of discontinued operations	0.0	(6.1)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(0.1)	(0.1)
Net increase (decrease) in cash, cash equivalents and restricted cash	(6.8)	52.2
Cash, cash equivalents and restricted cash at beginning of period	183.0	130.9
Cash, cash equivalents and restricted cash at end of period	$ 176.2	$ 183.1