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Sales and Major Customers - Additional Information (Detail) - person | 12 Months Ended
--- | ---
Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Segment Reporting [Abstract] |  |  |
Number of customers with revenue exceeding 10% of total Company revenue | 2 | 2 | 0
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