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Operating Segments and Related Information - Schedule of Company's Operating Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | $ 242.0 | $ 313.1 | $ 516.2 | $ 628.3 |
Cost of revenue | 196.4 | 247.5 | 425.1 | 514.1 |
Selling, general and administrative | 35.1 | 42.9 | 72.9 | 82.4 |
Depreciation and amortization | 4.4 | 4.4 | 8.8 | 8.8 |
Other operating (income) loss | 1.2 | (10.5) | 1.1 | (8.6) |
Income (loss) from operations | 4.9 | 28.8 | 8.3 | 31.6 |
Other data: |  |  |  |  |
Capital expenditures | 6.1 | 3.1 | 10.8 | 8.7 |
Investments | 4.4 |  | 4.4 |  | $ 3.6
Total assets | 890.9 |  | 890.9 |  | 891.1
Infrastructure |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 233.1 | 305.2 | 498.0 | 613.1 |
Life Sciences |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 3.2 | 1.7 | 6.3 | 2.7 |
Spectrum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 5.7 | 6.2 | 11.9 | 12.5 |
Operating Segments | Infrastructure |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 233.1 | 305.2 | 498.0 | 613.1 |
Cost of revenue | 191.4 | 243.5 | 414.9 | 506.6 |
Selling, general and administrative | 26.8 | 33.8 | 56.1 | 64.7 |
Depreciation and amortization | 3.1 | 2.9 | 6.2 | 5.9 |
Other operating (income) loss | 1.2 | (10.5) | 1.1 | (8.9) |
Income (loss) from operations | 10.6 | 35.5 | 19.7 | 44.8 |
Other data: |  |  |  |  |
Capital expenditures | 5.1 | 2.7 | 9.2 | 7.9 |
Investments | 0.0 |  | 0.0 |  | 0.0
Total assets | 695.7 |  | 695.7 |  | 683.6
Operating Segments | Life Sciences |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 3.2 | 1.7 | 6.3 | 2.7 |
Cost of revenue | 2.1 | 1.1 | 4.4 | 1.7 |
Selling, general and administrative | 3.8 | 4.5 | 7.5 | 8.0 |
Depreciation and amortization | 0.1 | 0.1 | 0.2 | 0.2 |
Other operating (income) loss | 0.0 | 0.0 | 0.0 | 0.0 |
Income (loss) from operations | (2.8) | (4.0) | (5.8) | (7.2) |
Other data: |  |  |  |  |
Capital expenditures | (0.1) | 0.0 | 0.0 | 0.1 |
Investments | 1.8 |  | 1.8 |  | 1.8
Total assets | 10.7 |  | 10.7 |  | 11.9
Equity method investments | 0.9 |  | 0.9 |  | 0.9
Operating Segments | Spectrum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 5.7 | 6.2 | 11.9 | 12.5 |
Cost of revenue | 2.9 | 2.9 | 5.8 | 5.8 |
Selling, general and administrative | 1.9 | 1.8 | 3.8 | 3.7 |
Depreciation and amortization | 1.2 | 1.3 | 2.4 | 2.6 |
Other operating (income) loss | 0.0 | 0.1 | 0.0 | 0.1 |
Income (loss) from operations | (0.3) | 0.1 | (0.1) | 0.3 |
Other data: |  |  |  |  |
Capital expenditures | 1.1 | 0.4 | 1.6 | 0.7 |
Investments | 0.0 |  | 0.0 |  | 0.0
Total assets | 176.2 |  | 176.2 |  | 178.9
Non-Operating Corporate |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Cost of revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Selling, general and administrative | 2.6 | 2.8 | 5.5 | 6.0 |
Depreciation and amortization | 0.0 | 0.1 | 0.0 | 0.1 |
Other operating (income) loss | 0.0 | (0.1) | 0.0 | 0.2 |
Income (loss) from operations | (2.6) | (2.8) | (5.5) | (6.3) |
Other data: |  |  |  |  |
Capital expenditures | 0.0 | 0.0 | 0.0 | 0.0 |
Investments | 2.6 |  | 2.6 |  | 1.8
Total assets | 8.3 |  | 8.3 |  | 16.7
Other and Eliminations |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Cost of revenue | 0.0 | 0.0 | 0.0 | 0.0 |
Selling, general and administrative | 0.0 | 0.0 | 0.0 | 0.0 |
Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.0 |
Other operating (income) loss | 0.0 | 0.0 | 0.0 | 0.0 |
Income (loss) from operations | 0.0 | 0.0 | 0.0 | 0.0 |
Other data: |  |  |  |  |
Capital expenditures | 0.0 | $ 0.0 | 0.0 | $ 0.0 |
Investments | 0.0 |  | 0.0 |  | 0.0
Total assets | $ 0.0 |  | $ 0.0 |  | $ 0.0

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