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Supplementary Balance Sheet Information (Details Textual)	12 Months Ended
	Dec. 31, 2018
Supplementary Balance Sheet Information (Textual)
Average rate of short-term deposit	2.29%
Deposit maturity	Jun. 30, 2020
Deposit maturity rate	1.80%

X

- Definition

Deposit maturity.

+ References

No definition available.

+ Details

Name:	mndo_DepositMaturity
Namespace Prefix:	mndo_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of deposit maturity rate.

+ References

No definition available.

+ Details

Name:	mndo_DepositMaturityRate
Namespace Prefix:	mndo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- References

No definition available.

+ Details

Name:	mndo_SupplementaryBalanceSheetInformationTextualAbstract
Namespace Prefix:	mndo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration