Revenues - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Subscription contracts term	1 year
Unsatisfied performance obligation on subscription contract term	1 year
Revenues	$ 20,019	$ 24,420
Remaining performance obligation	1,035
Accounts receivable, after allowance for credit loss, current	$ 4,521	4,633	$ 5,063
Deferred costs expected period of benefit	30 months
Impairment losses related to costs capitalized	$ 0	0
Google [Member]
Disaggregation Of Revenue [Line Items]
Revenues	7,150	8,637
New Google [Member]
Disaggregation Of Revenue [Line Items]
Accounts receivable	$ 1,788	$ 1,787
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Subscription contracts term	2 years
Advance advertiser invoicing period	12 months
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Advance advertiser invoicing period	3 months
Subscription remaining performance obligations expected duration	1 year