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Right-of-use assets and lease liabilities (Tables) | 12 Months Ended
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Dec. 31, 2020
Right-of-use assets and lease liabilities |
Schedule of right-of-use assets for long-term operating leases | ​
​ | ​ | ​
(In thousands) |  | Office leases
Balance at January 1, 2019 on adoption of ASC 842 Leases |  | 11,819
Additions |  | 3,830
Modification of operating lease |  | (1,107)
Amortization |  | (5,634)
Effect of foreign currency exchange differences |  | (161)
Net book amount at December 31, 2019 | ​ | 8,747
Additions | ​ | 500
Modification of operating lease | ​ | (3,825)
Amortization | ​ | (3,685)
Effect of foreign currency exchange differences | ​ | 217
Net book amount at December 31, 2020 |  | 1,954
Schedule of undiscounted cash payment | The undiscounted cash payment for each of the next five years as of December 31, 2019 is: ​
​ | ​ | ​
(In thousands) |  |
2020 |  | 5,034
2021 |  | 3,000
2022 |  | 1,279
Total undiscounted payments |  | 9,313
Less: effect of discounting |  | (488)
Discounted lease liabilities |  | 8,825
​ The undiscounted cash payment for each of the next five years as of December 31, 2020 is: ​
​ | ​ | ​
(In thousands) |  |
2021 |  | 1,998
2022 |  | 28
Total undiscounted payments | ​ | 2,026
Less: effect of discounting | ​ | (38)
Discounted lease liabilities |  | 1,988

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of right-of-use assets for long-term operating leases. + References No definition available. + Details
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