Description of Business and Summary of Significant Accounting Policies and Practices - Allowance for Advertiser Credits Activity (Detail) - Allowances for Customer Credits [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Allowance For Advertiser Credits [Abstract]
Balance at beginning of period	$ 84	$ 157
Additions charged against revenue	472	461
Credits processed and other	445	534
Balance at end of period	$ 111	$ 84

Description of Business and Summary of Significant Accounting Policies and Practices - Allowance for Advertiser Credits Activity (Detail) - Allowances for Customer Credits [Member] - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Allowance For Advertiser Credits [Abstract]

Balance at beginning of period

$ 84

$ 157

Additions charged against revenue

472

461

Credits processed and other

445

534

Balance at end of period

$ 111

$ 84