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Fair Value Measurements - Schedule of Valuation Activity for the Embedded Conversion Feature Liability (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018 | Sep. 30, 2017
Derivative liabilities, carrying amount, beginning |  | $ 72,563 |
Recognition of conversion feature on June 11, 2018 | $ 18,045,496 |  |
Derivative liability change upon extinguishment of debt |  | (1,099,165) |
Derivative liabilities, carrying amount, ending | 1,313,321 | 1,313,321 |
Embedded Conversion Feature Liability [Member] |  |  |
Derivative liabilities, carrying amount, beginning |  | 72,563 |
Recognition of conversion feature on June 11, 2018 |  | 78,432 |
Recognition of conversion feature on June 15, 2018 |  | 552,171 |
Derivative liability change upon extinguishment of debt |  | (1,071,860) |
Change in fair value |  | 368,694 |
Derivative liabilities, carrying amount, ending |  |  |
Embedded Conversion Feature Liability [Member] | 8% Promissory Notes [Member] |  |  |
Derivative liabilities, carrying amount, beginning |  |  |
Recognition of conversion feature on June 11, 2018 |  | 78,432 |
Recognition of conversion feature on June 15, 2018 |  | 81,169 |
Derivative liability change upon extinguishment of debt |  | (29,860) |
Change in fair value |  | (129,741) |
Derivative liabilities, carrying amount, ending |  |  |
Embedded Conversion Feature Liability [Member] | 10% Convertible Debentures [Member] |  |  |
Derivative liabilities, carrying amount, beginning |  |  |
Recognition of conversion feature on June 11, 2018 |  |  |
Recognition of conversion feature on June 15, 2018 |  | 471,002 |
Derivative liability change upon extinguishment of debt |  | (1,042,000) |
Change in fair value |  | 570,998 |
Derivative liabilities, carrying amount, ending |  |  |
Embedded Conversion Feature Liability [Member] | Series G Conversion Feature [Member] |  |  |
Derivative liabilities, carrying amount, beginning |  |  |
Recognition of conversion feature on June 11, 2018 |  | 72,563 |
Recognition of conversion feature on June 15, 2018 |  |  |
Derivative liability change upon extinguishment of debt |  |  |
Change in fair value |  | (72,563) |
Derivative liabilities, carrying amount, ending |  |  |

X
- Definition Amount of a favorable spread to a debt holder between the amount of debt being converted and the value of the securities received upon conversion. This is an embedded conversion feature of convertible debt issued that is in-the-money at the commitment date. + References No definition available. + Details
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Namespace Prefix: | MVEN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of a favorable spread to a debt holder between the amount of debt being converted and the value of the securities received upon conversion. This is an embedded conversion feature of convertible debt issued that is in-the-money at the commitment date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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Balance Type: | credit
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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