Name:	intz_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrossAtPriceEqualToMarketValue
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Data Type:	xbrli:sharesItemType
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Period Type:	duration

Weighted average price equal to the market value at which grantees can acquire the shares reserved for issuance on stock options awarded.

No definition available.

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Namespace Prefix:	intz_
Data Type:	dtr-types:perShareItemType
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- References

No definition available.

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Data Type:	xbrli:sharesItemType
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- References

No definition available.

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
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Data Type:	xbrli:stringItemType
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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	duration

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	duration

Number of options outstanding, including both vested and non-vested options.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
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Period Type:	duration

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.