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INTANGIBLE ASSETS, NET | 12 Months Ended
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Dec. 31, 2021
INTANGIBLE ASSETS, NET |
INTANGIBLE ASSETS, NET | 8. INTANGIBLE ASSETS, NET The following table summarizes the Company’s intangible assets, net: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Gross |  | ​ |  | ​
​ | ​ | Carrying | ​ | Accumulated | ​ | ​
At December 31, 2021 | ​ | Amount | ​ | Amortization | ​ | Net
​ | ​ | $ | ​ | $ | ​ | $
Technical know-how | ​ | 1,577 | ​ | (1,562) | ​ | 15
Computer software |  | 39,059 | ​ | (20,082) | ​ | 18,977
Total intangible assets, net |  | 40,636 | ​ | (21,644) | ​ | 18,992
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Gross |  | ​ |  | ​
​ | ​ | Carrying | ​ | Accumulated | ​ | ​
At December 31, 2020 | ​ | Amount | ​ | Amortization | ​ | Net
​ | ​ | $ | ​ | $ | ​ | $
Technical know-how |  | 1,543 | ​ | (1,525) | ​ | 18
Computer software |  | 41,085 | ​ | (18,674) | ​ | 22,411
Total intangible assets, net |  | 42,628 | ​ | (20,199) | ​ | 22,429
​ Amortization expense for the years ended December 31, 2019, 2020 and 2021 were $5,310, $5,122 and $4,601, respectively. Amortization expenses of the above intangible assets are expected to be approximately $4,409, $3,228, $2,691, $2,198, $2,052 and $4,414 for the years ending December 31, 2022, 2023, 2024, 2025, 2026 and thereafter, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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