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Licensed rights and other intangible assets | 3 Months Ended
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Mar. 31, 2022
Goodwill And Intangible Assets Disclosure [Abstract] |
Licensed rights and other intangible assets |
6. | Licensed rights and other intangible assets
The following provides information about our license rights and other intangible assets, net (in thousands):
|  | March 31, 2022 |  |  | December 31, 2021 |
|  | Gross |  |  |  |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |  |  |
|  | Carrying |  |  | Accumulated |  |  |  |  |  |  | Carrying |  |  | Accumulated |  |  |  |  |
|  | Amount |  |  | Amortization |  |  | Net |  |  | Amount |  |  | Amortization |  |  | Net |
Licensed rights and intangible assets subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
License rights |  | $ | 40,000 |  |  | $ | 7,580 |  |  | $ | 32,420 |  |  | $ | 40,000 |  |  | $ | 6,826 |  |  | $ | 33,174 |
Hormone therapy drug patents |  |  | 6,117 |  |  |  | 1,229 |  |  |  | 4,888 |  |  |  | 5,834 |  |  |  | 1,042 |  |  |  | 4,792 |
Hormone therapy drug patents applied and pending approval |  |  | 1,907 |  |  |  | — |  |  |  | 1,907 |  |  |  | 2,020 |  |  |  | — |  |  |  | 2,020 |
License rights and other intangible assets subject to amortization |  |  | 48,024 |  |  |  | 8,809 |  |  |  | 39,215 |  |  |  | 47,854 |  |  |  | 7,868 |  |  |  | 39,986 |
Intangible assets not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks/trade name rights |  |  | 332 |  |  |  | — |  |  |  | 332 |  |  |  | 332 |  |  |  | — |  |  |  | 332 |
License rights and other intangible assets, net |  | $ | 48,356 |  |  | $ | 8,809 |  |  | $ | 39,547 |  |  | $ | 48,186 |  |  | $ | 7,868 |  |  | $ | 40,318 |
We recorded amortization expense related to the exclusive license rights agreement with Population Council of $0.8 million for the three months ended March 31, 2022 and 2021. We recorded amortization expense related to patents of $0.2 million and $0.1 million for the three months ended March 31, 2022 and 2021, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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