CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 29, 2019	Dec. 30, 2018
Current assets:
Cash and cash equivalents	$ 181.0	$ 182.7
Restricted cash	0.0	0.3
Accounts receivable, net	65.6	64.6
Unbilled receivables, net	176.2	172.8
Inventoried costs	68.2	46.8
Prepaid expenses	10.1	8.9
Other current assets	9.9	10.3
Current assets of discontinued operations	4.6	8.3
Total current assets	515.6	494.7
Property, plant and equipment, net	115.7	67.1
Operating lease right-of-use assets	44.8
Goodwill	458.1	425.7
Intangible assets, net	37.8	16.1
Other assets	6.3	6.5
Total assets	1,178.3	1,010.1
Current liabilities:
Accounts payable	42.4	46.6
Accrued expenses	39.0	38.1
Accrued compensation	36.2	33.5
Accrued interest	6.5	1.6
Billings in excess of costs and earnings on uncompleted contracts	34.0	34.9
Current portion of operating lease liabilities	10.9
Other current liabilities	8.9	4.7
Current liabilities of discontinued operations	3.6	5.3
Total current liabilities	181.5	164.7
Long-term debt principal, net of current portion	294.8	294.2
Operating lease liabilities, net of current portion	39.5
Other long-term liabilities	77.5	25.5
Long-term liabilities of discontinued operations	2.8	6.4
Total liabilities	596.1	490.8
Commitments and contingencies
Redeemable noncontrolling interest	15.5	0.0
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at September 29, 2019 and December 30, 2018	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 106,269,609 and 103,766,899 shares issued and outstanding at September 29, 2019 and December 30, 2018, respectively	0.0	0.0
Additional paid-in capital	1,282.7	1,244.5
Accumulated other comprehensive loss	(1.0)	(0.7)
Accumulated deficit	(715.0)	(724.5)
Total stockholders’ equity	566.7	519.3
Total liabilities and stockholders’ equity	$ 1,178.3	$ 1,010.1