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Stockholders Deficit - Summary of Weighted Average Assumptions Used in Black-Sholes Option-pricing Model (Details) - $ / shares
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Common stock value (per share) $ 31.60 $ 26.90
Expected volatility 45.26% 48.42%
Risk-free interest rate 0.49% 2.19%
Expected life (years) 7 years 7 years
Forfeiture rate 0.00% 0.00%
Dividend rate 0.00% 0.00%