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Note 10 - Operating Lease (Details Textual) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Jun. 30, 2022 USD ($) ft²
Operating Lease, Right-of-Use Asset | $ 197,000 | $ 279,000 |
Operating Lease, Liability | 225,000 |  |
Operating Lease, Cost | 104,000 | 104,000 |
Variable Lease, Cost | $ 91,000 | $ 89,000 |
Minneapolis, MN [Member] |  |  |
Area of Real Estate Property | ft² |  |  | 6,000
Lessee, Operating Lease, Term of Contract |  |  | 65 months
Operating Lease, Right-of-Use Asset |  |  | $ 446,000
Operating Lease, Liability |  |  | $ 446,000

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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- 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 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 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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