Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands		2 Months Ended	7 Months Ended	9 Months Ended
	May 14, 2025	Sep. 30, 2024	Jul. 29, 2024	Sep. 30, 2025
Other Significant Noncash Transactions [Line Items]
Interest paid		$ 18,519		$ 52,511
Income taxes paid		2,987		19,220
Supplemental disclosure of non-cash operating, investing and financing activities:
Purchases of property and equipment accrued and not yet paid		1,268		4,092
Notes payable and other obligations issued for acquisitions		0		4,641
Settlement of derivative liability		967		0
Increases in lease assets in exchange for lease liabilities:
Operating leases		780		5,187
Finance leases		1,330		11,771
NV5 Global, Inc.
Supplemental disclosure of non-cash operating, investing and financing activities:
Equity consideration	$ 768,304	$ 4,000		$ 798,048
Predecessor
Other Significant Noncash Transactions [Line Items]
Interest paid			$ 32,332
Income taxes paid			14,579
Supplemental disclosure of non-cash operating, investing and financing activities:
Purchases of property and equipment accrued and not yet paid			2,434
Notes payable and other obligations issued for acquisitions			0
Settlement of derivative liability			0
Increases in lease assets in exchange for lease liabilities:
Operating leases			6,748
Finance leases			5,988
Predecessor | NV5 Global, Inc.
Supplemental disclosure of non-cash operating, investing and financing activities:
Equity consideration			$ 0