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Inventories | 6 Months Ended
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Jun. 30, 2021
Inventories |
Inventories | 6. Inventories The Group’s inventory balance of $11,114 and $13,144 as of June 30, 2021 and December 31, 2020, respectively, mainly consisted of finished goods purchased from Tesaro, Inc., now GlaxoSmithKline (GSK), for distribution in Hong Kong, and from NovoCure Limited (“Novocure”) and Deciphera Pharmaceuticals, LLC (“Deciphera”) for distribution in Hong Kong and China, as well as finished goods, work in process and certain raw materials for ZEJULA commercialization in China.
|  | As of |
|  | June 30, 2021 |  |  | December 31, 2020 |
|  | $ |  |  | $ |
Finished goods |  |  | 4,477 |  |  |  | 3,041 |
Raw materials |  |  | 6,269 |  |  |  | 10,103 |
Work in process |  |  | 368 |  |  |  | — |
Inventories |  |  | 11,114 |  |  |  | 13,144 |
The Group writes down inventory for any excess or obsolete inventories or when the Group believes that the net realizable value of inventories is less than the carrying value. During the three and six months ended June 30, 2021, the Group recorded write-downs of $277 and $290, respectively, in cost of revenues. During the three months and six months ended June 30, 2020, the Group recorded write-downs of $7 and $7, respectively, in cost of revenues.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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