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Sales and Major Customers - Additional Information (Detail) - person	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Segment Reporting [Abstract]
Number of customers with revenue exceeding 10% of total Company revenue	0	2	2
Percentage change in total revenues by one customer	10.00%	10.00%	10.00%

X

- Definition

Disclosure threshold for major customers.

+ References

No definition available.

+ Details

Name:	mind_DisclosureThresholdForMajorCustomers
Namespace Prefix:	mind_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of customers with revenue exceeding 10% of total Company revenue.

+ References

No definition available.

+ Details

Name:	mind_EntityWideRevenueMajorCustomerNumber
Namespace Prefix:	mind_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration