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v3.21.1

Condensed Consolidated Statements of Cash Flows (Parenthetical) - Senior Convertible Debentures [Member] | 6 Months Ended
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Jun. 30, 2019
Discount on debt percentage | 12.00%
Liquidation damage percentage | 12.00%

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- Definition Discount on debt percentage. + References No definition available. + Details
Name: | MVEN_DiscountOnDebtPercentage
Namespace Prefix: | MVEN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Liquidation damage percentage. + References No definition available. + Details
Name: | MVEN_LiquidationDamagePercentage
Namespace Prefix: | MVEN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DebtInstrumentAxis=MVEN_SeniorConvertibleDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |