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Intangible Assets, Net | 6 Months Ended
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Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible Assets, Net | 5. Intangible Assets, net Intangible assets are related to certain capitalized milestone and sublicense payments. The following table presents intangible assets (in thousands):
|  | June 30, 2020 |  |  | December 31, 2019 |
Intangible assets |  | $ | 19,773 |  |  | $ | 19,773 |
Less accumulated amortization |  |  | (19,773 | ) |  |  | (17,273 | )
Total |  | $ | - |  |  | $ | 2,500 |
We recorded cost of sales - amortization of intangible assets of $0.2 million and $2.3 million for the three months ended June 30, 2020 and 2019, respectively. We recorded cost of sales - amortization of intangible assets of $2.5 million and $4.6 million for the six months ended June 30, 2020 and 2019, respectively. See Note 7.

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- Definition The entire disclosure for all or part of the information related to 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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