CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 308,200,000	$ 72,800,000
Accounts receivable, net	131,700,000	128,800,000
Unbilled receivables, net	206,700,000	200,400,000
Inventoried costs	154,800,000	156,200,000
Prepaid expenses	28,800,000	16,000,000.0
Other current assets	21,000,000.0	20,000,000.0
Total current assets	851,200,000	594,200,000
Property, plant and equipment, net	271,200,000	243,600,000
Operating lease right-of-use assets	41,800,000	45,700,000
Goodwill	568,900,000	569,100,000
Intangible assets, net	58,100,000	62,400,000
Other assets	123,000,000.0	117,500,000
Total assets	1,914,200,000	1,632,500,000
Current liabilities:
Accounts payable	58,800,000	63,100,000
Accrued expenses	35,300,000	35,400,000
Accrued compensation	63,300,000	64,700,000
Accrued interest	1,100,000	1,700,000
Billings in excess of costs and earnings on uncompleted contracts	80,900,000	101,800,000
Current portion of operating lease liabilities	11,700,000	12,100,000
Other current liabilities	21,200,000	13,700,000
Total current liabilities	272,300,000	292,500,000
Long-term debt, net of current portion	179,500,000	219,300,000
Operating lease liabilities, net of current portion	34,100,000	37,800,000
Other long-term liabilities	99,000,000.0	84,400,000
Total liabilities	584,900,000	634,000,000.0
Commitments and contingencies (Note 14)
Redeemable noncontrolling interest	0	22,500,000
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at June 30, 2024 and December 31, 2023	0	0
Common stock, $0.001 par value, 195,000,000 shares authorized; 150,729,318 and 129,286,964 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	200,000	0
Additional paid-in capital	1,998,600,000	1,654,500,000
Accumulated other comprehensive income	1,500,000	1,700,000
Accumulated deficit	(671,000,000.0)	(680,200,000)
Total stockholders’ equity	1,329,300,000	976,000,000.0
Total liabilities and stockholders’ equity	$ 1,914,200,000	$ 1,632,500,000