Stock-Based Compensation - Summary of Grants of Performance-Based Restricted Stock Units Associated with Senior Executives and Key Employees (Parenthetical) (Detail) - Performance-Based Restricted Stock Units [Member] - Senior Executives [Member] - $ / shares	Jul. 22, 2021	Jul. 18, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value adjustment to closing price of common stock, percentage	108.00%	103.00%
Fair value adjustment to closing price of common stock, per share	$ 1.18	$ 0.55
Closing price of common stock	$ 14.75	$ 18.49