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Summary of Significant Accounting Policies (Details) - Schedule of digital currencies - $ / shares | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2021
Schedule of digital currencies [Abstract] |  |
Opening Digital currencies held (represented as number of Bitcoin) | $ 0.01 | $ 0.52
Additions of digital currencies (number of Bitcoin added) | 251.52 | 501.74
Sale of digital currencies (number of Bitcoin sold) | (249.77) | (500.5)
Digital currencies at September 30, 2021 (represented as a number of Bitcoin) | $ 1.76 | $ 1.76

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- Definition Additions of digital currencies. + References No definition available. + Details
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Namespace Prefix: | migi_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Digital currencies balance. + References No definition available. + Details
Name: | migi_DigitalCurrenciesBalance
Namespace Prefix: | migi_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Sale of digital currencies. + References No definition available. + Details
Name: | migi_SaleOfDigitalCurrencies
Namespace Prefix: | migi_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | migi_ScheduleOfDigitalCurrenciesAbstract
Namespace Prefix: | migi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration