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Net (Loss) Income Per Share Attributable to Common Stockholders - Anti-dilutive effect (Details) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Antidilutive Securities    
Antidilutive securities excluded from computation of diluted net loss per share 4,340,135 3,000
Option to purchase common stock    
Antidilutive Securities    
Antidilutive securities excluded from computation of diluted net loss per share 4,340,135 3,000