Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Tables)

v3.21.2
Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis The following tables presents the asset reported in "other assets" in the consolidated balance sheet measured at its fair value on a recurring basis as of June 30, 2021 and 2020 by level within the fair value hierarchy.
June 30, 2021 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs
Description Total Level 1 Level 2 Level 3
Recurring fair value measurements
    Marketable equity securities
          EuroSite Power Inc. $ 168,739  $ —  $ 168,739  $ — 
Total recurring fair value measurements $ 168,739  $ —  $ 168,739  $ — 
June 30, 2020 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs
Description Total Level 1 Level 2 Level 3
Recurring fair value measurements
Marketable equity securities
EuroSite Power Inc. $ 118,084  $ —  $ 118,084  $ — 
Total recurring fair value measurements $ 118,084  $ —  $ 118,084  $ — 
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, 2021 and 2020:
Fair value at December 31, 2020 $ 118,084 
Sale of 93,187 shares (5,591)
Unrealized gain 56,246 
Fair value at June 30, 2021 $ 168,739 
Fair value at December 31, 2019 $ 216,487 
Unrealized loss (98,403)
Fair value at June 30, 2020 $ 118,084 

During the six months ended June 30, 2021, we received net proceeds of $11,637 from the sale of 93,187 shares of Eurosite Power, Inc. common stock, and recognized a realized gain of $6,046 which is included in other income (expense), net in the condensed consolidated statements of operations.