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Sales and Major Customers - Summary of Company's Revenues from Customers by Geographic Region, Outside the U.S. (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Sales Information [Line Items] |  |  |
Total revenues from customers | $ 70,591 mind_RevenueFromExternalCustomers | $ 80,422 mind_RevenueFromExternalCustomers | $ 81,317 mind_RevenueFromExternalCustomers
Canada [Member] |  |  |
Sales Information [Line Items] |  |  |
Total revenues from customers | 7,376 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = country_CA | 13,113 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = country_CA | 13,744 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = country_CA
UK and Europe [Member] |  |  |
Sales Information [Line Items] |  |  |
Total revenues from customers | 17,427 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_UkAndEuropeMember | 23,456 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_UkAndEuropeMember | 27,174 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_UkAndEuropeMember
Latin America [Member] |  |  |
Sales Information [Line Items] |  |  |
Total revenues from customers | 12,706 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = us-gaap_LatinAmericaMember | 7,529 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = us-gaap_LatinAmericaMember | 15,575 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = us-gaap_LatinAmericaMember
Asia/South Pacific [Member] |  |  |
Sales Information [Line Items] |  |  |
Total revenues from customers | 18,407 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_AsiaSouthPacificMember | 25,256 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_AsiaSouthPacificMember | 14,173 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_AsiaSouthPacificMember
Eurasia [Member] |  |  |
Sales Information [Line Items] |  |  |
Total revenues from customers | 5,853 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_EurasiaMember | 6,810 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_EurasiaMember | 4,052 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_EurasiaMember
Other [Member] |  |  |
Sales Information [Line Items] |  |  |
Total revenues from customers | $ 8,822 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_OtherCountriesMember | $ 4,258 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_OtherCountriesMember | $ 6,599 mind_RevenueFromExternalCustomers / us-gaap_StatementGeographicalAxis = mind_OtherCountriesMember

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