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Income Taxes (Details) - Schedule of reconciliation between the income tax expense - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of reconciliation between the income tax expense [Abstract]      
Loss before income tax $ (33,624) $ (59,474) $ (54,266)
Tax credit at the U.S. federal corporate income tax rate of 21% (7,061) (12,490) (11,396)
Tax effect of permanent differences (2,152) (2,961) (4,033)
Tax effect of income tax rate difference in other jurisdictions 2,511 4,076 3,417
Changes in valuation allowance 6,702 11,669 17,943
Others 1 (105) 494
Income tax expense $ 1 $ 189 $ 6,425