Certain Risks and Concentration - PRC regulations (Details)	12 Months Ended
Dec. 31, 2021
Risks And Uncertainties [Abstract]
Total revenue derived from internet information services licenses	90.70%

The percentage of revenue from internet information services.

No definition available.

Name:	feng_PercentageOfRevenueFromInternetInformationServices
Namespace Prefix:	feng_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration