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Property, plant and equipment | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
Property, plant and equipment | Property, Plant and Equipment, net Property, plant and equipment at December 31, 2024 and 2023 consisted of the following:
| Estimated Useful Life (in Years) |  | 2024 |  | 2023
Energy systems | 10 - 15 years |  | $ | 2,810,232 |  |  | $ | 2,810,232 |
Machinery and equipment | 5 - 7 years |  | 1,598,538 |  |  | 1,744,596 |
Furniture and fixtures | 5 years |  | 224,868 |  |  | 212,963 |
Computer software | 3 - 5 years |  | 192,865 |  |  | 192,865 |
Leasehold improvements | * |  | 906,739 |  |  | 466,789 |
|  |  | 5,733,242 |  |  | 5,427,445 |
Less - accumulated depreciation and amortization |  |  | (3,995,206) |  |  | (4,264,868) |
Net property, plant and equipment |  |  | $ | 1,738,036 |  |  | $ | 1,162,577 |
* Lesser of estimated useful life of asset or lease term Depreciation and amortization expense on property and equipment for the years ended December 31, 2024 and 2023 was $354,485 and $454,859, respectively. During the year ended December 31, 2024, we received proceeds of $51,400 from the disposition of certain assets realizing a gain of $12,181. During the year ended December 31, 2023, we received proceeds of $34,655 from the disposition of certain assets and reversed $8,687 of accrued decomissioning costs from a former ADGE energy site, realizing a gain of $36,207. During the years December 31, 2024 and 2023, we evaluated the ADGE customer contracts and and related assets and did not deem any assets to be impaired. During the year ended December 31, 2024 and 2023 there were no ADGE contract terminations.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
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