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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | $ 134,987 | $ 144,948 | $ 128,349
Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 134,702 | 144,310 | 127,725
Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 285 | 638 | 624
Megaproject |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 82,885 | 95,399 | 83,665
Megaproject | Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 82,885 | 95,399 | 83,665
Megaproject | Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Original equipment manufacturer |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 31,940 | 31,525 | 25,995
Original equipment manufacturer | Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 31,748 | 31,337 | 25,548
Original equipment manufacturer | Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 192 | 188 | 447
Aftermarket |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 20,162 | 18,024 | 18,689
Aftermarket | Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 20,069 | 17,574 | 18,512
Aftermarket | Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 93 | 450 | 177
Middle East |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 68,176 | 59,937 | 49,678
Middle East | Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 68,084 | 59,538 | 49,501
Middle East | Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 92 | 399 | 177
Africa |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 15,010 | 30,731 | 26,936
Africa | Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 15,010 | 30,731 | 26,936
Africa | Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 51,801 | 54,280 | 51,735
Other | Water |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 51,608 | 54,041 | 51,288
Other | Emerging Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | $ 193 | $ 239 | $ 447

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