No definition available.

Name:	MGTI_LeaseIncentiveLoss
Namespace Prefix:	MGTI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

lease liability.

No definition available.

Name:	MGTI_LeaseLiability
Namespace Prefix:	MGTI_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Proceeds from issuance of stock under lease agreement.

No definition available.

Name:	MGTI_ProceedsFromIssuanceOfStockUnderLeaseAgreement
Namespace Prefix:	MGTI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Stock issued during period common stock to be issued shares.

No definition available.

Name:	MGTI_StockIssuedDuringPeriodCommonStockToBeIssuedShares
Namespace Prefix:	MGTI_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

Name:	us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Description of the nature and terms of commitment.

No definition available.

Name:	us-gaap_OtherCommitmentsDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Cash payments to lessor's for use of assets under operating leases.

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Name:	us-gaap_PaymentsForRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number of new stock issued during the period.

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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
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-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

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-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
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MGT CAPITAL INVESTMENTS, INC. 10-Q