| 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, 2024 and 2023 by level within the fair value hierarchy:
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Quoted prices in active markets for identical assets |
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Significant other observable inputs |
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Significant unobservable inputs |
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Total |
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Level 1 |
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Level 2 |
|
Level 3 |
|
Unrealized gain (loss) |
| December 31, 2024 |
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| Recurring fair value measurements |
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| Available-for-sale equity securities |
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|
| EuroSite Power Inc. |
$ |
93,744 |
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|
$ |
— |
|
|
$ |
93,744 |
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|
$ |
— |
|
|
$ |
— |
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| Total recurring fair value measurements |
$ |
93,744 |
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|
$ |
— |
|
|
$ |
93,744 |
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|
$ |
— |
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|
$ |
— |
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|
| December 31, 2023 |
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|
|
|
|
|
|
|
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| Recurring fair value measurements |
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|
|
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|
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| Available-for-sale equity securities |
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| EuroSite Power Inc. |
$ |
93,744 |
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|
$ |
— |
|
|
$ |
93,744 |
|
|
$ |
— |
|
|
$ |
— |
|
| Total recurring fair value measurements |
$ |
93,744 |
|
|
$ |
— |
|
|
$ |
93,744 |
|
|
$ |
— |
|
|
$ |
— |
|
The following table summarizes changes in Level 2 assets which are comprised of marketable equity securities for the years ended December 31, 2024 and 2023:
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|
|
|
|
| Fair value at December 31, 2022 |
$ |
93,744 |
|
| Unrealized gain |
— |
|
| Fair value at December 31, 2023 |
$ |
93,744 |
|
|
|
| Fair value at December 31, 2023 |
$ |
93,744 |
|
| Unrealized gain |
— |
|
| Fair value at December 31, 2024 |
$ |
93,744 |
|
The following table presents the liability reported in the consolidated balance sheet measured at its fair value on a recurring basis as of December 31, 2024 and 2023 by level within the fair value hierarchy:
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Quoted prices in active markets for identical assets |
|
Significant other observable inputs |
|
Significant unobservable inputs |
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|
|
Total |
|
Level 1 |
|
Level 2 |
|
Level 3 |
|
Total gains (losses) |
| December 31, 2024 |
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| Recurring fair value measurements |
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| Contingent contract consideration |
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| Current |
$ |
328,350 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
328,350 |
|
|
$ |
— |
|
| Long-term |
1,008,760 |
|
|
— |
|
|
— |
|
|
1,008,760 |
|
|
— |
|
| Total recurring fair value measurements |
$ |
1,337,110 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
1,337,110 |
|
|
$ |
— |
|
|
|
|
|
|
|
|
|
|
|
| December 31, 2023 |
|
|
|
|
|
|
|
|
|
| Recurring fair value measurements |
|
|
|
|
|
|
|
|
|
| Contingent contract consideration |
|
|
|
|
|
|
|
|
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| Current |
$ |
200,639 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
200,639 |
|
|
$ |
— |
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| Long-term |
994,743 |
|
|
— |
|
|
— |
|
|
994,743 |
|
|
— |
|
| Total recurring fair value measurements |
$ |
1,195,382 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
1,195,382 |
|
|
$ |
— |
|
|