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v3.20.4

Supplementary Balance Sheet Information (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure Text Block Supplement [Abstract] |  |
Average rate of short-term deposit | 1.27% | 2.42%

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- Definition Percentage of short term average rate deposits. + References No definition available. + Details
Name: | mndo_ShortTermDepositsAverageRate
Namespace Prefix: | mndo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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