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Taxation (Details) - Schedule of reconciliations of the income tax expenses - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Schedule of Reconciliations of the Income Tax Expenses [Abstract]      
Loss before income tax $ (19,764) $ (46,084) $ (63,230)
Income tax computed at statutory PRC income tax rate (25%) [1] (4,941) (11,521) (15,808)
Differential income tax rates applicable to certain entities comprising the Group 1,791 4,061 13,121
Effect of tax holiday 469 1,786 824
Permanent differences 2,100 1,826 [2] 451 [2]
Change in valuation allowance 1,569 5,405 2,735
Accelerated deductions on research and development expenses(iii) [3] (827) (1,313) (1,138)
Income tax expenses $ 161 $ 244 $ 185
[1] The PRC statutory income tax rate was used because the majority of the Group’s operations are based in the PRC.
[2] Permanent differences primarily represent non-deductible expenses.
[3] This amount represents tax incentives relating to the research and development expenses of certain major operating subsidiaries in the PRC. This tax incentive enables those subsidiaries to claim an additional tax deduction amounting to 75% of the qualified research and development expenses incurred.