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v3.20.1

Prepayments and Other Current Assets - Additional information (Details) | 12 Months Ended
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Dec. 31, 2019
Long term receivable unrelated party (in year) | 2 years
The interest rate of Loan granted to the unrelated party (in percent) | 10.00%
Prepaid content licenses | Minimum |
Amortization period (in year) | 1 year
Prepaid content licenses | Maximum |
Amortization period (in year) | 3 years

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- Definition The term of long term unrelated party. + References No definition available. + Details
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Namespace Prefix: | feng_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage of loan granted to the unrelated party. + References No definition available. + Details
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Namespace Prefix: | feng_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |