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Note 10 - Leases and Commitments (Details Textual) | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) ft² | Dec. 31, 2021 USD ($)
Operating Lease, Payments | $ | $ 24,000 | $ 155,000 | $ 109,000
Lease for Office Space in Austin, Texas [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² |  | 6,000 |

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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Details
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