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Cares Act Employee Retention Credit Receivable (Details Narrative) - USD ($) $ in Millions		12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
ERC receivable		$ 1.4
Remaining employee retention credit	$ 1.4
Employee Retention Credit [Member]
Interest and other income		$ 2.0

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- References

No definition available.

+ Details

Name:	intz_ERCReceivable
Namespace Prefix:	intz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	intz_ProceedsFromEmployeeRetentionCredit
Namespace Prefix:	intz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).

+ References

No definition available.

+ Details

Name:	us-gaap_InterestAndOtherIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Details

Name:	us-gaap_IncomeStatementLocationAxis=intz_EmployeeRetentionCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: