Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Tables)

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

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 September 30, 2021 and December 31, 2020 by level within the fair value hierarchy.


September 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.	$	131,242	$	—	$	131,242	$	—
Total recurring fair value measurements	$	131,242	$	—	$	131,242	$	—

December 31, 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 nine months ended September 30, 2021 and 2020:


Fair value at December 31, 2020	$	118,084
Sale of 93,187 shares	(5,591)
Unrealized gain	18,749
Fair value at September 30, 2021	$	131,242

Fair value at December 31, 2019	$	216,487
Unrealized loss	(98,403)
Fair value at September 30, 2020	$	118,084

During the nine months ended September 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.