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Lease (Tables) | 6 Months Ended
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Jun. 30, 2020
Lease |
Summary of supplemental information related to leases | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended June 30,
​ |  | 2019 |  | 2020
​ | ​ | $ | ​ | $
​ | ​ | (Unaudited) | ​ | ​
Operating fixed lease cost | ​ | 1,406 | ​ | 2,463
Summary of supplemental cash flow information related to leases | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended June 30,
​ |  | 2019 |  | 2020
​ | ​ | $ | ​ | $
​ | ​ | (Unaudited) | ​ | ​
Cash paid for amounts included in measurement of lease liabilities | ​ | 1,060 | ​ | 1,986
Non-cash operating lease liabilities arising from obtaining operating right-of-use assets | ​ | 1,666 | ​ | 1,036
Summary of maturities of lease liabilities | The maturities of lease liabilities in accordance with Leases (Topic 842) in each of the next five years and thereafter as of December 31, 2019 were as follows:
​ | ​ | ​
​ |  | Year ended
​ | ​ | December 31
​ | ​ | $
2020 | ​ | 4,595
2021 | ​ | 3,910
2022 | ​ | 3,039
2023 | ​ | 1,333
2024 | ​ | 1,379
Thereafter | ​ | 1,787
Total lease payments | ​ | 16,043
Less: imputed interest | ​ | (715)
Present value of minimum operating lease payments | ​ | 15,328
​ The maturities of lease liabilities in accordance with Leases (Topic 842) in each of the next five years and thereafter as of June 30, 2020 were as follows:
​ | ​ | ​
​ |  | Year ended
​ | ​ | December 31
​ | ​ | $
Remainder 2020 | ​ | 2,665
2021 | ​ | 4,229
2022 | ​ | 3,293
2023 | ​ | 1,641
2024 | ​ | 1,474
Thereafter | ​ | 2,135
Total lease payments | ​ | 15,437
Less: imputed interest | ​ | (805)
Present value of minimum operating lease payments | ​ | 14,632
Summary of weighted-average remaining lease terms and discount rates | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended June 30, |
​ |  | 2019 |  | 2020 |
​ | ​ | (Unaudited) | ​ | ​ |
Weighted-average remaining lease term |  | 2.9 years | ​ | 4.2 years | ​
Weighted-average discount rate |  | 4.4% | ​ | 3.2% | ​

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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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=77888426&loc=SL77918701-209980 + Details
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- Definition Summary of supplemental cash flow information related to leases. + References No definition available. + Details
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- Definition Summary of supplemental information related to leases. + References No definition available. + Details
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