2.4.0.8090800 - Disclosure - EMPLOYEE 401(k) PLANS (Details)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$c20120501to20130430http://www.sec.gov/CIK0000354813duration2012-05-01T00:00:002013-04-30T00:00:00U004Standardhttp://www.xbrl.org/2003/instancepurexbrli0U001Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$c20110501to20120430http://www.sec.gov/CIK0000354813duration2011-05-01T00:00:002012-04-30T00:00:00U001Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1us-gaap_CompensationAndRetirementDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0EMPLOYEE 401(k) PLANS [Abstract]2false 2itsi_MaximumVoluntarilyTaxDeferredContributionSpecifiedAsPercentageOfCompensationitsi_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.150.15falsefalsefalse2falsetruefalse00falsefalsefalsenum:percentItemTypepureEmployees voluntarily tax deferred contributions, maximum percentage of their compensation to a trust.No definition available.false0Maximum voluntarily tax deferred contribution by employee (in hundredths)3false 2us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercentus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.050.05falsefalsefalse2falsetruefalse00falsefalsefalsenum:percentItemTypepureMaximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.No definition available.false0Maximum annual contribution by employer (in hundredths)4false 2us-gaap_DefinedContributionPlanCostRecognizedus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse00USD$falsetruefalse2truefalsefalse00USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount of the cost recognized during the period for defined contribution plans.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Contributions by employerfalseEMPLOYEE 401(k) PLANS (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://ilts.com/role/Employee401KPlansDetails24