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Cares Act Employee Retention Credit Receivable (Details Narrative) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cares Act Employee Retention Credit Receivable
Employee retention credit	$ 2,000	$ (0)

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- References

No definition available.

+ Details

Name:	intz_DisclosureCaresActEmployeeRetentionCreditReceivableAbstract
Namespace Prefix:	intz_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	intz_EmployeeRetentionCredit
Namespace Prefix:	intz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration