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Note 10 - Contingent Liabilities and Commitments (Details Textual) - USD ($)						3 Months Ended		9 Months Ended
	Nov. 07, 2025	Oct. 01, 2025	Sep. 30, 2025	Sep. 29, 2025	Mar. 28, 2022	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jan. 01, 2025	Dec. 31, 2024	Jan. 01, 2024	Jan. 01, 2023	Jan. 01, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)								207,983
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)						6 years 1 month 6 days	4 years 1 month 6 days	5 years 8 months 12 days	4 years 3 months 18 days
First Defense, Product Line [Member]
Other Commitment			$ 65,000			$ 65,000		$ 65,000
Purchase of Inventory [Member]
Other Commitment			1,318,000			1,318,000		1,318,000
Information Technology Service [Member]
Other Commitment			258,000			258,000		258,000
Other Obligations [Member]
Other Commitment			$ 614,000			$ 614,000		$ 614,000
President and CEO [Member]
Salary and Wage, Officer, Excluding Cost of Good and Service Sold				$ 450,000
Employment Agreement, Maximum Amount of Potential Additional Annual Cash Bonuses				$ 400,000
Share Based Compensation Arrangement By Share Based Payment Award, Options, Maximum Shares Issuable (in shares)			150,260			150,260		150,260
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			75,983
President and CEO [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)			10 years
President and CEO [Member] | Subsequent Event [Member]
Employment Agreement, One-Time Signing Bonus		$ 100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	74,277
President and CEO [Member] | Deferred Compensation, Excluding Share-Based Payments and Retirement Benefits [Member]
Deferred Compensation Arrangement with Individual, Recorde Liability, Earned and Unpaid Sick Time			$ 239,369			$ 239,369		$ 239,369			$ 230,162			$ 222,379
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount										$ 300,000
Deferred Compensation Arrangement with Individual, Recorded Liability										$ 300,000		$ 200,000	$ 100,000
Deferred Compensation Arrangement with Individual, Recorded Liability, Vested Compensation			0			0		0			300,000
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage					100.00%
Deferred Compensation Arrangement with Individual, Maximum Contractual Term (Month)					12 months
Indemnification Agreement [Member]
Guarantor Obligations, Current Carrying Value			0			0		0			0
Fair Value Guarantee [Member]
Guarantor Obligations, Current Carrying Value			0			0		0			$ 0
Guarantor Obligations, Maximum Exposure, Undiscounted			$ 0			$ 0		$ 0

X

- Definition

Represent recorded liability related to earned and Unpaid sick time.

+ References

No definition available.

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X

- Definition

Represent vested compensation related to the deferred compensation arrangement.

+ References

No definition available.

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X

- Definition

Represents the maximum amount of potential additional annual cash bonuses that can be earned under an employment agreement.

+ References

No definition available.

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- Definition

Represents the amount of a one-time signing bonus provided under an employment agreement.

+ References

No definition available.

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X

- Definition

Represents the maximum number of shares issuable under options in a share based compensation arrangement.

+ References

No definition available.

+ Details

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X

- Definition

Amount of commitment made to pay deferred cash remuneration.

+ References

No definition available.

+ Details

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X

- Definition

Commitment made to pay deferred cash remuneration expressed as a percentage of the individual's base salary.

+ References

No definition available.

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X

- Definition

Maximum term of the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 55
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482943/710-10-55-7

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 710
-SubTopic 10
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483043/710-10-30-1

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X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

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X

- Definition

Amount of expense for salary and wage arising from service rendered by officer. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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X

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
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-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
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-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

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X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
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