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Redeemable Convertible Preferred Stock (Tables)
9 Months Ended
Sep. 30, 2019
Temporary Equity Disclosure [Abstract]  
Schedule of Fair Value Assumptions
The fair value of the redeemable convertible preferred stock warrants was determined using the following assumptions:
September 17, 2019December 31, 2018
Remaining contractual life (in years)1.62.3
Expected volatility38.8 %39.2 %
Risk-free interest rate1.8 %2.5 %
Expected dividend rate—  —  
In the three and nine months ended September 30, 2019, the warrants were exercised and such shares were settled via the net settlement method, resulting in the issuance of 174,347 shares of the Company's Class B common stock.