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Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Stock-based compensation
Total	$ 42,067	$ 69,714	$ 101,131
Non-cash stock-based compensation charged through Amount due from SINA	5,000	6,800	8,100
Cost of revenues
Stock-based compensation
Total	3,502	5,954	8,933
Sales and marketing
Stock-based compensation
Total	7,901	13,041	16,528
Product development
Stock-based compensation
Total	18,537	33,403	51,441
General and administrative
Stock-based compensation
Total	$ 12,127	$ 17,316	$ 24,229

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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- Definition

Amount of non-cash stock-based compensation charged through amount due from affiliate.

+ References

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