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Description of Business and Summary of Accounting Principles - Grant Income (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($)
Description of Business and Summary of Accounting Principles |
Grant income | $ 256,000

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

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- Definition The amount of grant income. + References No definition available. + Details
Name: | mgrm_GrantIncome
Namespace Prefix: | mgrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration