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Organization and Principal Activities (Details)	Dec. 31, 2019 subsidiary item
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of Subsidiaries | subsidiary	12
Number of VIE's	4
Number of subsidiaries of VIE's	25

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- Definition

Number of subsidiaries held as equity interest.

+ References

No definition available.

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- Definition

Number of subsidiaries of Variable Interest Entities (VIE's) held as equity interest.

+ References

No definition available.

+ Details

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- Definition

Number of Variable Interest Entities (VIE's) held as equity interest.

+ References

No definition available.

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Namespace Prefix:	feng_
Data Type:	xbrli:integerItemType
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- References

No definition available.

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