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Intangible Assets | 6 Months Ended
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Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible Assets | 5. Intangible Assets Intangible assets are related to certain capitalized milestone and sublicense payments. The following table presents intangible assets (in thousands):
|  | June 30, 2018 |  |  | December 31, 2017 |
Intangible assets |  | $ | 22,273 |  |  | $ | 2,500 |
Less accumulated amortization |  |  | (5,909 | ) |  |  | (1,194 | )
Total |  | $ | 16,364 |  |  | $ | 1,306 |
We recorded $2.3 million and $4.7 million as cost of sales – amortization of intangible assets for the three and six months ended June 30, 2018, 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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