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Intangible Assets, Net (Tables) | 3 Months Ended
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Mar. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Summary of Intangible Assets | Intangible assets are related to certain capitalized milestone and sublicense payments. The following table presents intangible assets (in thousands):
|  | March 31, 2020 |  |  | December 31, 2019 |
Intangible assets |  | $ | 19,773 |  |  | $ | 19,773 |
Less accumulated amortization |  |  | (19,571 | ) |  |  | (17,273 | )
Total |  | $ | 202 |  |  | $ | 2,500 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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