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Subsequent Events (Narrative) (Details) - Subsequent Event [Member] - Particle [Member] - Loan Granted to Related Party in January 2017 [Member] ¥ in Millions | 1 Months Ended
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Jan. 31, 2017 CNY (¥)
Subsequent Event [Line Items] |
Unsecured loans granted to Particle | ¥ 74.0
Interest rate of short-term unsecured loans | 9.00%
Maturity of short-term unsecured loans | 12 months

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- Definition Amount of short-term unsecured loans granted + References No definition available. + Details
Name: | feng_AmountOfShortTermUnsecuredLoansGranted
Namespace Prefix: | feng_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Interest rate of short-term unsecured loans per annum. + References No definition available. + Details
Name: | feng_InterestRateOfShortTermUnsecuredLoans
Namespace Prefix: | feng_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Period before short-term loans provided to a related party mature, in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
Name: | feng_MaturityOfShortTermUnsecuredLoans
Namespace Prefix: | feng_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=feng_ParticleIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | feng_LoansToRelatedPartiesAxis=feng_LoanGrantedToRelatedPartyInJanuary2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |