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INTANGIBLE ASSETS, NET | 12 Months Ended
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Dec. 31, 2020
INTANGIBLE ASSETS, NET |
INTANGIBLE ASSETS, NET | 8. INTANGIBLE ASSETS, NET The following table summarizes the Company’s intangible assets: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 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
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Gross |  | ​ |  | ​
​ | ​ | Carrying | ​ | Accumulated | ​ | ​
At December 31, 2019 | ​ | Amount | ​ | Amortization | ​ | Net
​ | ​ | $ | ​ | $ | ​ | $
Technical know-how |  | 1,428 | ​ | (1,425) | ​ | 3
Computer software |  | 38,205 | ​ | (15,417) | ​ | 22,788
Total intangible assets, net |  | 39,633 | ​ | (16,842) | ​ | 22,791
​ Amortization expense for the years ended December 31, 2018, 2019 and 2020 were $4,666, $5,310 and $5,122, respectively. Amortization expenses of the above intangible assets are expected to be approximately $4,443, $3,662, $3,035, $2,503, $2,034 and $6,752 for the years ended December 31, 2021, 2022, 2023, 2024, 2025 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://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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