Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Segment unit shares	Dec. 31, 2020 USD ($) unit shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Employer matching contribution, percent of match	100.00%
Employer matching contribution, percent of employees' eligible earnings, maximum	4.00%
Employer matching contribution, amount	$ 100	$ 400
Antidilutive securities excluded from computation of earnings per share (in shares) | shares	988,180	296,817
Accounts receivable, allowance	$ 368	$ 93
Number of operating segments | Segment	2
Number of reportable segments | Segment	1
Number of reporting units | unit	2	2
Provision for credit losses	$ 458	$ 307
Direct marketing expenses	105,800	115,100
Accrued liabilities and other liabilities, current	(27,042)	(28,429)
Accrued service providers	1,806	2,433
Accrued value-added, sales, and other non-income-based taxes	8,837	8,897
Current portion of income tax payable	$ 3,733	$ 1,536
Minimum | Licenses and domains
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	2 years
Minimum | Brands and trademarks
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	10 years
Minimum | Other Finite-Lived Intangible Asset
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	1 year
Maximum | Licenses and domains
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	5 years
Maximum | Other Finite-Lived Intangible Asset
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	6 years
Office and other equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	3 years
Office and other equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	5 years
Leasehold improvements | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	5 years
Internal-use software | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	3 years
Internal-use software | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible asset, useful life	6 years
Accounts Receivable | Customer Concentration Risk | Payment Provider One
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage (less than)	46.00%	32.00%
Accounts Receivable | Customer Concentration Risk | Payment Provider Two
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage (less than)	35.00%	47.00%
Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk | Advertising and Virtual Currency
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage (less than)	3.00%	3.00%