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Concentrations (Details) | 12 Months Ended
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Dec. 31, 2014 item | Dec. 31, 2013 item
Concentrations |  |
Number of areas in which operations are concentrated | 1 intz_NumberOfAreasInWhichOperationsAreConcentrated |
One individual commercial customer |  |
Concentrations |  |
Number of customers | 1 intz_NumberOfMajorCustomers / us-gaap_MajorCustomersAxis = intz_OneIndividualCommercialCustomerMember | 1 intz_NumberOfMajorCustomers / us-gaap_MajorCustomersAxis = intz_OneIndividualCommercialCustomerMember
Four government customers |  |
Concentrations |  |
Number of customers | 4 intz_NumberOfMajorCustomers / us-gaap_MajorCustomersAxis = intz_FourGovernmentCustomersMember | 4 intz_NumberOfMajorCustomers / us-gaap_MajorCustomersAxis = intz_FourGovernmentCustomersMember
Total revenues | Customer | U.S. Government |  |
Concentrations |  |
Percentage of revenue | 51.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = intz_RevenuesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = intz_UnitedStatesGovernmentMember | 50.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = intz_RevenuesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = intz_UnitedStatesGovernmentMember
Total revenues | Customer | One individual commercial customer |  |
Concentrations |  |
Percentage of revenue | 30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = intz_RevenuesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = intz_OneIndividualCommercialCustomerMember | 30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = intz_RevenuesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = intz_OneIndividualCommercialCustomerMember
Total revenues | Customer | Four government customers |  |
Concentrations |  |
Percentage of revenue |  | 46.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = intz_RevenuesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = intz_FourGovernmentCustomersMember

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- Definition Represents the number of areas in which operations of the entity are concentrated. + References No definition available. + Details
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Namespace Prefix: | intz_
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- Definition Represents the number of major customers of the entity. + References No definition available. + Details
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Namespace Prefix: | intz_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Details
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- Details
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- Details
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