Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - New Stock Repurchase Program [Member] $ in Millions	Feb. 24, 2022 USD ($)
Subsequent Event [Line Items]
Shares authorized to be repurchased amount	$ 50.0
Authorization description	(1) the new stock repurchase program shall continue until the earlier of the date an aggregate of $50.0 million of common stock has been repurchased , or until suspended or terminated by the Board of Directors, in its sole discretion; and (2) all shares of common stock repurchased pursuant to the new program shall be retired and be available for use and reissuance for purposes as and when determined by the Board of Directors including, without limitation, pursuant to the Company's 2017 Equity Incentive Plan and the Company’s 2021 Employee Stock Purchase Plan.
Class A Common Stock [Member]
Subsequent Event [Line Items]
Shares authorized to be repurchased amount	$ 50.0

(1) the new stock repurchase program shall continue until the earlier of the date an aggregate of $50.0 million of common stock has been repurchased , or until suspended or terminated by the Board of Directors, in its sole discretion; and (2) all shares of common stock repurchased pursuant to the new program shall be retired and be available for use and reissuance for purposes as and when determined by the Board of Directors including, without limitation, pursuant to the Company's 2017 Equity Incentive Plan and the Company’s 2021 Employee Stock Purchase Plan.