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

X

- 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

X

- 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

X

- Details

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