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GOODWILL (Tables) | 12 Months Ended
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Dec. 31, 2018
GOODWILL |
Schedule of changes in carrying amount of goodwill |
|  | As of December 31,
|  | 2017 |  | 2018
Costs: |  |  |  |
Beginning balance |  | 401 |  | 428
Addition (Note 3) |  | — |  | 25,035
Foreign currency adjustment |  | 27 |  | (367)
Ending balance |  | 428 |  | 25,096
Goodwill impairment loss |  | — |  | —
Goodwill, net |  | 428 |  | 25,096

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