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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2021
INCOME TAXES |
Schedule of Income Tax Expenses | Income tax expenses comprise: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ |  | 2019 |  | 2020 |  | 2021
Current tax expenses | ​ | $ | 4,941 | ​ | $ | 29,436 | ​ | $ | 156,894
Deferred tax (benefit) expenses | ​ |  | 4,682 | ​ |  | (1,254) | ​ |  | 13,207
Total | ​ | $ | 9,623 | ​ | $ | 28,182 | ​ | $ | 170,101
Schedule of Deferred Tax Assets and Liabilities | The principal components of deferred income tax assets and liabilities from continuing operations are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2021
Deferred tax assets: | ​ | ​ | ​ | ​ | ​ | ​
Long-lived assets depreciation | ​ | $ | 1,665 | ​ | $ | 1,546
Deferred government subsidies | ​ | ​ | 60 | ​ | ​ | 68
Net operating loss carried forward | ​ | ​ | 709 | ​ | ​ | 816
Sub-total | ​ | $ | 2,434 | ​ | $ | 2,430
Valuation Allowance | ​ | ​ | (709) | ​ | ​ | (816)
Total deferred tax assets | ​ | $ | 1,725 | ​ | $ | 1,614
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax liabilities: | ​ |  | ​ | ​ |  | ​
Long-lived assets depreciation | ​ | $ | (4,540) | ​ | $ | (3,258)
Difference in basis of buildings | ​ | ​ | (646) | ​ | ​ | (621)
Dividend withholding tax | ​ | ​ | — | ​ | ​ | (14,461)
Total deferred tax liabilities | ​ | $ | (5,186) | ​ | $ | (18,340)
Deferred tax liabilities, net | ​ | $ | (3,461) | ​ | $ | (16,726)
Schedule of Changes of Valuation Allowance | The changes of valuation allowance from continuing operation are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ |  | 2019 |  | 2020 |  | 2021
Beginning balance | ​ | $ | — | ​ | $ | 729 | ​ | ​ | 709
Reversal | ​ |  | 735 | ​ |  | (65) | ​ |  | 87
Foreign exchange effect | ​ |  | (6) | ​ |  | 45 | ​ |  | 20
Ending Balance | ​ | $ | 729 | ​ | $ | 709 | ​ | ​ | 816
Schedule of Effective Income Tax Rate Reconciliation | The effective income tax rate from continuing operation is different from the expected PRC statutory rate as a result of the following items: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, |
​ |  | 2019 |  | 2020 |  | 2021 |
PRC Enterprise Income Tax |  | 25 | % | 25 | % | 25 | %
Preferential income tax rate of a subsidiary |  | (14) | % | (11) | % | (10) | %
Effect of different reversal rate | ​ | 5 | % | — | ​ | — | ​
R&D Super deduction |  | (3) | % | (1) | % | — | %
Different tax rate in other jurisdictions |  | 12 | % | 4 | % | — | ​
Dividend withholding tax | ​ | — | ​ | — | ​ | 1 | %
Effective tax rate |  | 25 | % | 17 | % | 16 | %

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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