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v3.22.2

Revenue (Details) | 12 Months Ended
--- | ---
Apr. 30, 2022
Minimum |
Accounts Receivable and Allowance for Doubtful Accounts [Line Items] |
Accounts receivable collection terms | 30 days
Maximum |
Accounts Receivable and Allowance for Doubtful Accounts [Line Items] |
Accounts receivable collection terms | 45 days

X
- Definition Accounts receivable collection terms. + References No definition available. + Details
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Namespace Prefix: | mei_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accounts receivable and allowance for doubtful accounts. + References No definition available. + Details
Name: | mei_AccountsReceivableandAllowanceforDoubtfulAccountsLineItems
Namespace Prefix: | mei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |