CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 28, 2020	Dec. 29, 2019
Current assets:
Cash and cash equivalents	$ 397.2	$ 172.6
Accounts receivable, net	59.8	85.0
Unbilled receivables, net	186.4	179.4
Inventoried costs	66.9	61.1
Prepaid expenses	14.6	9.4
Other current assets	19.6	11.4
Current assets of discontinued operations	0.5	3.3
Total current assets	745.0	522.2
Property, plant and equipment, net	122.3	116.9
Operating lease right-of-use assets	38.0	42.1
Goodwill	465.5	455.6
Intangible assets, net	39.2	39.5
Other assets	9.2	9.7
Total assets	1,419.2	1,186.0
Current liabilities:
Accounts payable	44.9	53.8
Accrued expenses	28.5	32.7
Accrued compensation	38.8	37.1
Accrued interest	1.6	1.6
Billings in excess of costs and earnings on uncompleted contracts	34.4	34.3
Current portion of operating lease liabilities	8.3	9.9
Other current liabilities	10.5	10.0
Current liabilities of discontinued operations	3.0	3.3
Total current liabilities	170.0	182.7
Long-term debt	295.9	295.1
Operating lease liabilities, net of current portion	34.3	37.6
Other long-term liabilities	77.0	78.7
Long-term liabilities of discontinued operations	2.6	2.8
Total liabilities	579.8	596.9
Commitments and contingencies (Note 15)
Redeemable noncontrolling interest	14.9	15.0
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at June 28, 2020 and December 29, 2019	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 122,510,125 and 106,635,508 shares issued and outstanding at June 28, 2020 and December 29, 2019, respectively	0.0	0.0
Additional paid-in capital	1,537.9	1,286.5
Accumulated other comprehensive loss	(0.5)	(0.4)
Accumulated deficit	(712.9)	(712.0)
Total stockholders’ equity	824.5	574.1
Total liabilities and stockholders’ equity	$ 1,419.2	$ 1,186.0
Shares outstanding (in shares)	122,510,125	106,635,508