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v3.20.1

Commitments and Contingencies (Details Narrative) - USD ($) | 9 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017
SayMedia, Inc [Member] |  |
Lease rent expense | $ 298,685 | $ 354,979

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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=MVEN_SayMediaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |