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Organization and Principal Activities (Details) | Dec. 31, 2019 subsidiary item
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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 of Variable Interest Entities (VIE's) held as equity interest. + References No definition available. + Details
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Namespace Prefix: | feng_
Data Type: | xbrli:integerItemType
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- Definition Number of Variable Interest Entities (VIE's) held as equity interest. + References No definition available. + Details
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Namespace Prefix: | feng_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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