Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Tables)

v3.23.1
Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets Measured on Recurring Basis The following table presents the asset reported in the consolidated balance sheet measured at its fair value on a recurring basis as of December 31, 2022 and 2021 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 Unrealized gain (loss)
December 31, 2022
Recurring fair value measurements
     Available-for-sale equity securities
          EuroSite Power Inc. $ 93,744  $ —  $ 93,744  $ —  $ 18,749 
Total recurring fair value measurements $ 93,744  $ —  $ 93,744  $ —  $ 18,749 
December 31, 2021
Recurring fair value measurements
     Available-for-sale equity securities
          EuroSite Power Inc. $ 74,995  $ —  $ 74,995  $ —  $ (37,498)
Total recurring fair value measurements $ 74,995  $ —  $ 74,995  $ —  $ (37,498)
The following table summarizes changes in Level 2 assets which are comprised of marketable equity securities for the years ended December 31, 2022 and 2021:

Fair value at December 31, 2020 $ 118,084 
Sale of 93,187 shares (5,592)
Unrealized loss (37,497)
Fair value at December 31, 2021 $ 74,995 
Fair value at December 31, 2021 $ 74,995 
Unrealized gain 18,749 
Fair value at December 31, 2022 $ 93,744