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Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from the Calculation of Diluted Loss Per Share (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Stock options and RSUs      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive stock options 7,467,603 7,159,494 5,273,964