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v2.4.1.9

Employee Benefit Plan (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Employee 401(k) Plan |  |
Minimum age for contribution of an additional amount of salary per year by participants | 50 years |
Matching contribution by employer per dollar of contribution by participant | 0.25%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch |
Maximum contribution by employer (as a percent) | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent |
Contribution by employer | $ 29,000 us-gaap_DefinedContributionPlanCostRecognized | $ 28,000 us-gaap_DefinedContributionPlanCostRecognized
Minimum |  |
Employee 401(k) Plan |  |
Contribution by participating employee (as a percent) | 1.00%intz_DefinedContributionPlanPercentageOfContributionByEmployees / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum |  |
Employee 401(k) Plan |  |
Contribution by participating employee (as a percent) | 25.00%intz_DefinedContributionPlanPercentageOfContributionByEmployees / us-gaap_RangeAxis = us-gaap_MaximumMember |

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- Definition Represents the minimum age required for contribution of an additional amount of salary per year by participants. + References No definition available. + Details
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Namespace Prefix: | intz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the percentage of annual compensation of employee for which employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | intz_DefinedContributionPlanPercentageOfContributionByEmployees
Namespace Prefix: | intz_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References 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 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |