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Note 1 - Organization and Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities (Details) - shares | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Potentially dilutive securities excluded from calculation (in shares) | 15,622,956 | 16,091,419
Unvested Restricted Stock [Member] |  |
Potentially dilutive securities excluded from calculation (in shares) | 11,360,541 | 11,439,016
Share-Based Payment Arrangement, Option [Member] |  |
Potentially dilutive securities excluded from calculation (in shares) | 4,073,816 | 4,465,216
Warrant [Member] |  |
Potentially dilutive securities excluded from calculation (in shares) | 165,214 | 165,214
Convertible Debt Securities [Member] |  |
Potentially dilutive securities excluded from calculation (in shares) | 23,385 | 21,973

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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