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Certain Risks and Concentration - PRC regulations (Details)	12 Months Ended
	Dec. 31, 2019
Risks And Uncertainties [Abstract]
Total revenue derived from internet information services licenses	88.90%

X

- Definition

The percentage of revenue from internet information services.

+ References

No definition available.

+ Details

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Namespace Prefix:	feng_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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