XML 96 R89.htm IDEA: XBRL DOCUMENT
v3.20.1

Sales and Major Customers - Additional Information (Detail) - person | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Segment Reporting [Abstract] |  |  |
Number of customers with revenue exceeding 10% of total Company revenue | 0 | 0 | 2
Percentage change in total revenues by one customer (as a percent) | 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