| Schedule of Finite-Lived Intangible Assets |
Intangible assets and liabilities at December 31, 2022 and 2021 consist of the following:
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December 31, 2022 |
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December 31, 2021 |
| 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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$ |
777,465 |
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$ |
(584,863) |
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$ |
192,602 |
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$ |
765,850 |
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$ |
(532,676) |
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$ |
233,174 |
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| Patents |
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888,910 |
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(405,140) |
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483,770 |
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871,021 |
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(314,997) |
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556,024 |
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| Developed technology |
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240,000 |
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(156,000) |
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84,000 |
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240,000 |
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(140,000) |
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100,000 |
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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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(65,984) |
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197,952 |
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263,936 |
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(28,279) |
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235,657 |
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| Favorable contract assets |
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384,465 |
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(372,091) |
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12,374 |
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384,465 |
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(355,193) |
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29,272 |
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$ |
2,581,672 |
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$ |
(1,584,078) |
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$ |
997,594 |
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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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| Intangible liability |
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| Unfavorable contract liability |
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$ |
2,618,168 |
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$ |
(1,797,951) |
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$ |
820,217 |
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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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| 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 |
| 2023 |
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$ |
203,295 |
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$ |
(236,705) |
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$ |
(33,410) |
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| 2024 |
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182,413 |
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(160,325) |
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22,088 |
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| 2025 |
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177,841 |
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(113,449) |
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64,392 |
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| 2026 |
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173,702 |
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(65,232) |
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108,470 |
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| 2027 |
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172,468 |
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(57,591) |
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114,877 |
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| Thereafter |
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60,979 |
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(186,915) |
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(125,936) |
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$ |
970,698 |
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$ |
(820,217) |
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$ |
150,481 |
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