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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
	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

X

- Definition

Amount of short-term unsecured loans granted

+ References

No definition available.

+ Details

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Namespace Prefix:	feng_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Interest rate of short-term unsecured loans per annum.

+ References

No definition available.

+ Details

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

X

- Definition

Period before short-term loans provided to a related party mature, in 'PnYnMnDTnHnMnS' format.

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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.

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No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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

X

- Details

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