Note 9 - Leases - Lease Cost (Details) - USD ($)	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Operating lease costs	$ 281,121	$ 215,331
Short-term operating lease costs	11,187	5,400
Amortization of right-of-use assets	0	2,304
Interest on lease liabilities	0	92
Total financing lease expense	0	2,396
Total lease expense	292,308	223,127
Increase in operating lease right-of-use asset and right-of-use liability for new lease	830,720	0
Right-of-use assets obtained in exchange for new financing lease liabilities	$ 0	$ 0
Weighted-average remaining lease term (years) - operating leases (Year)	10 years 8 months 12 days	10 years 3 months 18 days
Weighted-average remaining lease term (years) - financing leases (Year)		2 months 12 days
Weighted-average discount rate - operating leases	6.75%	6.75%
Weighted-average discount rate - financing leases	0.00%	6.75%

Represents the amount of finance lease expense during the period.

No definition available.

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Namespace Prefix:	inis_
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Balance Type:	debit
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- Definition

Amount of interest expense on finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Amount of amortization expense attributable to right-of-use asset from finance lease.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Weighted average discount rate for finance lease calculated at point in time.

+ References

+ Details

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- Definition

Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

+ Details

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

+ References

+ Details

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