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Note 7 - Net Loss Per Share - Antidilutive Securities (Details) - shares | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Antidilutive securities (in shares) | 11,544,408 | 13,728,708
Warrant [Member] |  |
Antidilutive securities (in shares) | 193,481 | 208,744
Share-Based Payment Arrangement, Option [Member] |  |
Antidilutive securities (in shares) | 11,119,350 | 13,493,432
Employee Stock Purchase Plan Award [Member] |  |
Antidilutive securities (in shares) | 31,577 | 26,532
Restricted Stock Units (RSUs) [Member] |  |
Antidilutive securities (in shares) | 200,000 | 0

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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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