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Share-based Compensation - Additional Information (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Jun. 03, 2020
Mar. 22, 2018
Restricted Stock Units (RSUs)      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Unrecognized share-based compensation costs in respect of granted RSUs $ 7,969    
Unrecognized share-based compensation remaining weighted average period 1 year 7 months 6 days    
2018 Stock Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of common stock authorized   4,500,000 3,000,000
Common stock available for future issuance 1,525,624