Number of shares issued during the period as a result of the conversion of convertible securities.

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Name:	us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
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Data Type:	xbrli:sharesItemType
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Period Type:	duration

Variable Interest Entities and Joint Ventures (Details) - The9 Joint Venture - USD ($) $ in Millions	Feb. 23, 2021	Mar. 24, 2019
Class A Common Stock
Schedule of Equity Method Investments [Line Items]
Conversion of notes payable into class A common stock (in shares)	423,053
The9 Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage		50.00%
Conditional obligation		$ 5.0