Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Tables)

v3.23.2
Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2023
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 consolidated balance sheet measured at its fair value on a recurring basis as of June 30, 2023 and 2022 by level within the fair value hierarchy.
June 30, 2023 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs Unrealized
Description Total Level 1 Level 2 Level 3  Gains
Recurring fair value measurements
    Marketable equity securities
          EuroSite Power Inc. $ 131,241  $ —  $ 131,241  $ —  $ 37,497 
Total recurring fair value measurements $ 131,241  $ —  $ 131,241  $ —  $ 37,497 
June 30, 2022 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs Unrealized
Description Total Level 1 Level 2 Level 3 Gains
Recurring fair value measurements
Marketable equity securities
EuroSite Power Inc. $ 112,492  $ —  $ 112,492  $ —  $ 37,497 
Total recurring fair value measurements $ 112,492  $ —  $ 112,492  $ —  $ 37,497 
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 six months ended June 30, 2023 and 2022:
Fair value at December 31, 2022 $ 93,744 
Unrealized gains 37,497 
Fair value at June 30, 2023 $ 131,241 
Fair value at December 31, 2021 $ 74,995 
Unrealized gains 37,497 
Fair value at June 30, 2022 $ 112,492