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Note 5 - Fair Value Measurements (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Notes Tables |  |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|  | September 30, 2023 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 809,997 |  |  | $ | - |  |  | $ | - |  |  | $ | 809,997 |
|  | December 31, 2022 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 58,242 |  |  | $ | - |  |  | $ | - |  |  | $ | 58,242 |
|  | December 31, 2022 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 58,242 |  |  | $ | - |  |  | $ | - |  |  | $ | 58,242 |
Other liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
|  | December 31, 2021 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 1,600,663 |  |  | $ | - |  |  | $ | - |  |  | $ | 1,660,663 |
Other liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration |  | $ | - |  |  | $ | - |  |  | $ | 930,000 |  |  | $ | 930,000 |
Asset Acquisition, Contingent Consideration [Table Text Block] |
Fair value of contingent consideration: |  |  |  |
December 31, 2022 |  | $ | - |
Additions |  |  | 682,000 |
March 31, 2023 |  |  | 682,000 |
Additions |  |  | - |
June 30, 2023 |  |  | 682,000 |
Settlements |  |  | (682,000 | )
September 30, 2023 |  | $ | - |

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- Definition Tabular disclosure of contingent consideration in asset acquisition. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 50 -Name Accounting Standards Codification -Section 15 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480123/805-50-15-3 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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