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Severance Pay (Details) - Summary of amounts accrued and the portions funded, with severance pay funds and by the insurance policies - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Summary of amounts accrued and the portions funded, with severance pay funds and by the insurance policies [Abstract] |  |
Accrued severance pay | $ 1,865 | $ 1,775
Less - amounts funded (presented in “investment and other non-current assets”) | (1,823) | (1,725)
Unfunded balance | $ 42 | $ 50

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- Definition This element represents the carrying value of severance pay fund as of the balance sheet date. + References No definition available. + Details
Name: | mndo_SeverancePayFundNoncurrent
Namespace Prefix: | mndo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Represents the unfunded balance in the severance liability. + References No definition available. + Details
Name: | mndo_UnfundedBalance
Namespace Prefix: | mndo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant