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v3.19.3.a.u2

COMMITMENTS (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract] |  |
Rental Expense | $ 791 | $ 803

X
- Definition Total estimated rental expense. + References No definition available. + Details
Name: | mgyr_RentalExpense
Namespace Prefix: | mgyr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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