XML 124 R101.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Fair Value Measurements (Other financial instruments not measured at fair value in the balance sheets) (Details) $ in Millions | Dec. 31, 2016 USD ($)
--- | ---
Fair Value Measurements [Abstract] |
Estimated fair value of convertible loans | $ 15.8

X
- Definition Estimated fair value of convertible loans. + References No definition available. + Details
Name: | feng_EstimatedFairValueOfConvertibleLoans
Namespace Prefix: | feng_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration