Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements (Tables)

v3.25.3
Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis The following tables present the asset reported in "other assets" in the condensed consolidated balance sheet measured at its fair value on a recurring basis as of September 30, 2025 and 2024 by level within the fair value hierarchy.
Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs
Total Level 1 Level 2 Level 3 Gains (losses)
September 30, 2025
Recurring fair value measurements
    Marketable equity securities
          EuroSite Power Inc. $ 18,749  $ —  $ 18,749  $ —  $ (74,995)
Total recurring fair value measurements $ 18,749  $ —  $ 18,749  $ —  $ (74,995)
September 30, 2024
Recurring fair value measurements
Marketable equity securities
EuroSite Power Inc. $ 93,744  $ —  $ 93,744  $ —  $ — 
Total recurring fair value measurements $ 93,744  $ —  $ 93,744  $ —  $ — 
Schedule of Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings
The following table summarizes changes in Level 2 assets which are comprised of marketable equity securities for the three and nine months ended September 30, 2025 and 2024:
Fair value at December 31, 2024 $ 93,744 
Unrealized loss (74,995)
Fair value at September 30, 2025 $ 18,749 
Fair value at December 31, 2023 $ 93,744 
Unrealized gain — 
Fair value at September 30, 2024 $ 93,744 
Fair Value, Liabilities Measured on Recurring Basis
Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs
Total Level 1 Level 2 Level 3 Total gains (losses)
September 30, 2025
Recurring fair value measurements
Contingent contract consideration
Acquisition liabilities, current portion $ 394,266  $ —  $ —  $ 394,266  $ — 
Acquisition liabilities, net of current portion 816,951  —  —  816,951  — 
Total recurring fair value measurements $ 1,211,217  $ —  $ —  $ 1,211,217  $ — 
September 30, 2024
Recurring fair value measurements
Contingent contract consideration
Acquisition liabilities, current portion $ 284,289  $ —  $ —  $ 284,289  $ — 
Acquisition liabilities, net of current portion 1,078,829  —  —  1,078,829  — 
Total recurring fair value measurements $ 1,363,118  $ —  $ —  $ 1,363,118  $ —