XML 71 R36.htm IDEA: XBRL DOCUMENT
v3.20.1

FAIR VALUE DISCLOSURES (Narrative) (Details) - USD ($) | Mar. 31, 2020 | Sep. 30, 2019
--- | --- | ---
Fair Value Disclosures [Abstract] |  |
Mortgage Servicing Rights | $ 20,000 | $ 26,000

X
- Definition Mortgage Servicing Rights. + References No definition available. + Details
Name: | mgyr_MortgageServicingRightsMSRs
Namespace Prefix: | mgyr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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