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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of acquired intangible assets | Other intangible assets are amortized in equal installments over their estimated useful lives as follows:
Intangible Asset |  | Amortization Period
Option over non-financial assets |  | Over the period of the relevant agreement
Components of the Company's acquired intangible assets are comprised of the following:
|  | December 31, 2021
|  | Gross |  | Accumulated amortization and impairment charges |  | Net
Utrophin program acquired |  | $ | 4,487 |  |  | $ | (4,487) |  |  | $ | — |
Discuva platform acquired |  | 14,416 |  |  | (4,017) |  |  | 10,399 |
Option over non-financial asset |  | 912 |  |  | (912) |  |  | — |
Other patents and licenses |  | 148 |  |  | (148) |  |  | — |
|  | $ | 19,963 |  |  | $ | (9,564) |  |  | $ | 10,399 |
|  | December 31, 2020
|  | Gross |  | Accumulated amortization and impairment charges |  | Net
Utrophin program acquired |  | $ | 4,534 |  |  | $ | (4,534) |  |  | $ | — |
Discuva platform acquired |  | 14,565 |  |  | (3,050) |  |  | 11,515 |
Option over non-financial asset(1) |  | 921 |  |  | (921) |  |  | — |
Other patents and licenses |  | 150 |  |  | (150) |  |  | — |
|  | $ | 20,170 |  |  | $ | (8,655) |  |  | $ | 11,515 |
(1)During the year ended December 31, 2020, management identified an impairment related to the option over non-financial asset pursuant to an Evaluation and Option Agreement with a collaboration partner. The partner is no longer conducting antibiotic candidate programs over which the Company had the option, management therefore determined that the fair value of the option to acquire the assignment of the proprietary rights for antibiotic candidates is $0. Accordingly, the asset was written off in its entirety resulting in an impairment charge of $859 recognized in operating expenses.
Schedule estimated future amortization expense related to acquired intangible assets | The estimated net amortization expense related to acquired intangible assets for future years is:
|  | Amount
2022 |  | $ | 999 |
2023 |  | $ | 999 |
2024 |  | $ | 999 |
2025 |  | $ | 999 |
2026 |  | $ | 999 |
Thereafter |  | $ | 5,404 |

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