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v2.4.1.9

Segment Reporting - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Schedule Of Sales Revenue By Business Segment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 14,963 us-gaap_Revenues | $ 22,906 us-gaap_Revenues | $ 19,545 us-gaap_Revenues | $ 25,732 us-gaap_Revenues | $ 23,647 us-gaap_Revenues | $ 20,275 us-gaap_Revenues | $ 20,895 us-gaap_Revenues | $ 27,291 us-gaap_Revenues | $ 83,146 us-gaap_Revenues | $ 92,108 us-gaap_Revenues | $ 104,685 us-gaap_Revenues
Reduction in capital expenditures and fixed assets |  |  |  |  |  |  |  |  | 192 mind_ReductionInCapitalExpendituresAndFixedAssets | 32 mind_ReductionInCapitalExpendituresAndFixedAssets | 349 mind_ReductionInCapitalExpendituresAndFixedAssets
Intersegment Sales Elimination [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule Of Sales Revenue By Business Segment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 489 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | $ 166 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | $ 1,041 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember

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- Definition Reduction in capital expenditures and fixed assets. + References No definition available. + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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