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Intangible Assets and Deferred Consideration
9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Deferred Consideration Intangible Assets and Deferred Consideration
Intangible Assets
Our customer relationship intangible asset relates to customer relationships acquired in connection with an acquisition executed on July 10, 2023 with Evoqua Water Technologies LLC ("Evoqua") (the "Evoqua Asset Acquisition").
The details of our intangible assets subject to amortization are set forth below (in thousands):
September 30, 2025
Useful LifeGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Customer Relationships20 years$11,035 $(1,241)$9,794 
December 31, 2024
Useful LifeGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Customer Relationships20 years$11,035 $(828)$10,207 
During each of the three months ended September 30, 2025 and 2024, the Company recorded amortization of its customer relationship intangible asset of $0.1 million. During each of the nine months ended September 30, 2025 and 2024, the Company recorded amortization of its customer relationship intangible asset of $0.4 million.
Estimated future amortization expense on the Company's customer relationships intangible asset as of September 30, 2025 is as follows (table in thousands):
Year ending December 31:
2025 (remainder of year)$138 
2026552 
2027552 
2028552 
2029552 
Thereafter7,448 
Total$9,794 
Deferred Consideration
A portion of the purchase price of the Evoqua Asset Acquisition was deferred on the acquisition date, with payment terms extending through April 2026. During the three and nine months ended September 30, 2025, the Company made payments of $0.8 million and $1.6 million, respectively. As of September 30, 2025, a deferred consideration liability of $1.8 million is presented in Deferred Consideration - Current on the accompanying condensed consolidated balance sheet.