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SUPPLEMENTAL FINANCIAL STATEMENT DATA (Tables) | 9 Months Ended
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Sep. 30, 2022
SUPPLEMENTAL FINANCIAL STATEMENT DATA |
Schedule of equipment and leasehold improvements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2022 |  | 2021
​ | ​ | (in thousands)
Furniture and fixtures | ​ | $ | 4,065 | ​ | $ | 4,070
Computer hardware and software | ​ |  | 33,085 | ​ |  | 26,425
Leasehold improvements | ​ |  | 3,083 | ​ |  | 3,011
Equipment under finance leases | ​ |  | 5,204 | ​ |  | 3,286
Automobiles, trucks, and field equipment | ​ |  | 3,102 | ​ |  | 3,099
Subtotal | ​ |  | 48,539 | ​ |  | 39,891
Accumulated depreciation and amortization | ​ |  | (27,392) | ​ |  | (23,134)
Equipment and leasehold improvements, net | ​ | $ | 21,147 | ​ | $ | 16,757
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2022 |  | 2021
​ | ​ | (in thousands)
Accrued subcontractor costs | ​ | $ | 34,624 | ​ | $ | 19,727
Other | ​ |  | 5,013 | ​ |  | 2,750
Compensation and payroll taxes | ​ |  | 3,676 | ​ |  | 2,244
Accrued bonuses | ​ | ​ | 3,606 | ​ | ​ | 7,767
Employee withholdings | ​ |  | 3,396 | ​ |  | 2,665
Accrued workers’ compensation insurance | ​ |  | 681 | ​ |  | 527
Total accrued liabilities | ​ | $ | 50,996 | ​ | $ | 35,680
Schedule of changes in the carrying value of goodwill by reporting unit | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | Additional | ​ | Additions / | ​ | September 30,
​ |  | 2021 |  | Purchase Cost |  | Adjustments |  | 2022
​ | ​ | (in thousands)
Reporting Unit: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Energy | ​ | $ | 129,375 | ​ | $ | — | ​ | $ | — | ​ | $ | 129,375
Engineering and Consulting | ​ | ​ | 749 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 749
​ | ​ | $ | 130,124 | ​ | $ | — | ​ | $ | — | ​ | $ | 130,124
Schedule of gross amounts and accumulated amortization of the Company's acquired identifiable intangible assets with finite useful lives | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2022 | ​ | December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross | ​ | Accumulated | ​ | Gross | ​ | Accumulated | ​ | Amortization
​ |  | Amount |  | Amortization |  | Amount |  | Amortization |  | Period
​ | ​ | (in thousands) | ​ | (in years)
Finite: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Backlog | ​ | $ | 7,944 | ​ | $ | 7,872 | ​ | $ | 7,944 | ​ | $ | 7,222 | ​ | 1.0
Tradename | ​ |  | 15,911 | ​ |  | 10,492 | ​ |  | 15,911 | ​ |  | 8,997 |  | 2.5 | ​ | - | ​ | 6.0
Non-compete agreements | ​ | ​ | 1,420 | ​ | ​ | 1,420 | ​ | ​ | 1,420 | ​ | ​ | 1,413 | ​ | 4.0 | ​ | - | ​ | 5.0
Developed technology | ​ | ​ | 15,810 | ​ | ​ | 11,141 | ​ | ​ | 15,500 | ​ | ​ | 8,950 | ​ | 8.0
Customer relationships | ​ | ​ | 58,149 | ​ | ​ | 24,127 | ​ | ​ | 58,149 | ​ | ​ | 19,939 | ​ | 5.0 | ​ | - | ​ | 8.0
Total finite intangible assets | ​ | ​ | 99,234 | ​ | ​ | 55,052 | ​ | ​ | 98,924 | ​ | ​ | 46,521 | ​ | ​ | ​ | ​ | ​ | ​
In-process research and technology (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 310 | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Total intangible assets | ​ | $ | 99,234 | ​ | $ | 55,052 | ​ | $ | 99,234 | ​ | $ | 46,521 | ​ | ​ | ​ | ​ | ​ | ​
| (1) | In-process research and technology will not be amortized until put into use.
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