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Stockholders' Equity - Weighted-Average Grant Date Fair Value of Stock Options and Related Assumptions (Detail) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Expected term, in years 5 years 7 months 6 days 5 years 7 months 6 days
Risk-free interest rates 0.70% 0.70%
Expected volatility 34.20% 34.20%
Dividend yield 0.00% 0.00%
Weighted-average estimated fair value of options granted [1] $ 7.21 $ 7.21
[1]

Of the total the weighted-average estimated fair value of the Zynga Replacement Stock options, $5.10 was allocated to the post-combination value.