| Schedule of intangible assets |
| | | | | | | | | | | | | | | | | March 31, 2023 | | | Gross | | | | | | | | | | | Weighted | | | Carrying | | Accumulated | | Impairment | | Net Book | | Average | | | Amount | | Amortization | | Loss | | Value | | Useful Life | License rights from related parties | | $ | 136,665,000 | | $ | (135,976,594) | | $ | — | | $ | 688,406 | | 3 - 5 years | License rights | | $ | 3,000,000 | | $ | (3,000,000) | | $ | — | | $ | — | | 5 years | Intangible assets - other: | | | | | | | | | | | | | | | Software | | $ | 51,784 | | $ | (51,784) | | $ | — | | $ | — | | 3 years | Trademark | | | 10,745 | | | (9,311) | | | — | | | 1,434 | | 12 years | In-progress patent | | | 270,886 | | | — | | | — | | | 270,886 | | | Total: | | $ | 333,415 | | $ | (61,095) | | $ | — | | $ | 272,320 | | |
| | | | | | | | | | | | | | | | | December 31, 2022 | | | Gross | | | | | | | | | | | Weighted | | | Carrying | | Accumulated | | Impairment | | Net Book | | Average | | | Amount | | Amortization | | Loss | | Value | | Useful Life | License rights from related parties | | $ | 136,665,000 | | $ | (135,280,942) | | $ | — | | $ | 1,384,058 | | 3 - 5 years | License rights | | $ | 3,000,000 | | $ | (3,000,000) | | $ | — | | $ | — | | 5 years | Intangible assets - other: | | | | | | | | | | | | | | | Software | | $ | 51,784 | | $ | (51,784) | | $ | — | | $ | — | | 3 years | Trademark | | | 10,745 | | | (9,110) | | | — | | | 1,635 | | 12 years | In-progress patent | | | 270,886 | | | — | | | — | | | 270,886 | | | Total: | | $ | 333,415 | | $ | (60,894) | | $ | — | | $ | 272,521 | | |
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