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Inventories | 12 Months Ended
--- | ---
Dec. 31, 2021
Inventories |
Inventories | 7. Inventories ​
​ | ​ | ​ | ​ | ​
(In thousands) |  | December 31, 2020 |  | December 31, 2021
Hardware devices (note) |  | 4,830 |  | 1,595
Others |  | 324 |  | 238
Less: Impairment |  | (3,428) |  | (470)
Total |  | 1,726 |  | 1,363
​
Note: | Hardware devices mainly include OneThing Cloud and hard disks. OneThing Cloud is a hardware, which can act as a micro server between users and Xunlei, which enables users to share their idle uplink capacity with Xunlei.
The inventory written down was USD3,283,000 and USD429,000 for the years ended December 31, 2020 and 2021, respectively.

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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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