| Schedule of Finite-Lived Intangible Assets |
Intangible assets and liabilities at December 31, 2021 and 2020 consist of the following:
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December 31, 2021 |
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December 31, 2020 |
| Intangible assets |
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Cost |
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Accumulated Amortization |
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Net |
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Cost |
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Accumulated Amortization |
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Net |
| Product certifications |
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$ |
765,850 |
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$ |
(532,676) |
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$ |
233,174 |
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$ |
726,159 |
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$ |
(478,357) |
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$ |
247,802 |
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| Patents |
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871,021 |
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(314,997) |
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556,024 |
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855,014 |
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(220,764) |
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634,250 |
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| Developed technology |
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240,000 |
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(140,000) |
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100,000 |
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240,000 |
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(124,000) |
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116,000 |
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| Trademarks |
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26,896 |
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— |
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26,896 |
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26,896 |
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— |
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26,896 |
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| In process R&D |
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263,936 |
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(28,279) |
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235,657 |
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263,936 |
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— |
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263,936 |
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| Favorable contract assets |
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384,465 |
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(355,193) |
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29,272 |
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384,465 |
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(313,031) |
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71,434 |
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$ |
2,552,168 |
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$ |
(1,371,145) |
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$ |
1,181,023 |
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$ |
2,496,470 |
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$ |
(1,136,152) |
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$ |
1,360,318 |
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| Intangible liability |
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| Unfavorable contract liability |
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$ |
3,056,655 |
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$ |
(1,797,149) |
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$ |
1,259,506 |
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$ |
2,534,818 |
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$ |
(917,767) |
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$ |
1,617,051 |
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| Schedule of Estimated Future Amortization Expense |
Aggregate future amortization over the next five years is estimated to be as follows:
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Non-contract related intangibles |
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Contract related intangibles |
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Total |
| 2022 |
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$ |
205,807 |
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$ |
(318,198) |
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$ |
(112,391) |
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| 2023 |
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198,762 |
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(253,372) |
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(54,610) |
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| 2024 |
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178,196 |
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(208,448) |
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(30,252) |
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| 2025 |
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173,624 |
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(130,116) |
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43,508 |
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| 2026 |
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169,484 |
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(81,899) |
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87,585 |
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| Thereafter |
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214,710 |
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(253,929) |
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(39,219) |
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$ |
1,140,583 |
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$ |
(1,245,962) |
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$ |
(105,379) |
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