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Equity Based Awards - Summary of Calculated Via The Black-Scholes Option Pricing Model (Detail)

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Equity Based Awards - Summary of Calculated Via The Black-Scholes Option Pricing Model (Detail) - 2013 Stock Plan [Member] - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Line Items]      
Expected option term (in years) 6 years 21 days 5 years 10 months 9 days 6 years 25 days
Expected volatility 52.20% 53.10% 52.60%
Risk-free interest rate 1.50% 0.56% 1.89%
Expected dividend yield 0.00% 0.00% 0.00%
Fair value of common stock (per share) $ 1.01 $ 2.36 $ 1.81