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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) | 12 Months Ended
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Sep. 30, 2021 $ / shares
Statement of Stockholders' Equity [Abstract] |
Exchange rate per share | $ 1.2213

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- Definition Exchange rate per share. + References No definition available. + Details
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Namespace Prefix: | mgyr_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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