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Note 11 - Equity (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Notes Tables |  |
Schedule of Stock by Class [Table Text Block] |  |
|  | December 31 |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
|  | Number of authorized shares |  |  | Number of authorized shares |  |  | Number of issued shares |  |  | Number of issued shares |
Shares of common stock |  |  | 256,880,000 |  |  |  | 256,880,000 |  |  |  | 3,678,550 |  |  |  | 265,485 |
Series A Preferred Stock |  |  |  |  |  |  |  |  |  |  | - |  |  |  | - |
Series B Preferred Stock |  |  | 3,120,000 |  |  |  | 3,120,000 |  |  |  | 1,516,199 |  |  |  | - |
Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  | 159,966 |  |  |  | - |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
|  | Number of Warrants |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Life |
Outstanding warrants, January 1, 2024 |  |  | 193,433 |  |  | $ | 23.46 |  |  |  | 2.74 |
Series C Warrants (Note 10.a) |  |  | 86,820 |  |  |  | 24.62 |  |  |  |  |
Broker warrants for Series C Offering (Note 10.a) |  |  | 4,163 |  |  |  | 12.31 |  |  |  |  |
PIPE Warrants (Note 10.a) |  |  | 823,529 |  |  |  | 6.83 |  |  |  |  |
WaveDancer legacy warrants (Note 4) |  |  | 76,098 |  |  |  | 94.69 |  |  |  |  |
Outstanding warrants, September 30, 2024 |  |  | 1,184,043 |  |  | $ | 16.51 |  |  |  | 4.06 |
|  | Number of Warrants |  |  | Weighted Average Remaining Life |
Outstanding warrants, January 1, 2024 |  |  | 54,782 |  |  |  | 1.51 |
Pre-funded warrants (Note 10.a) |  |  | 504,324 |  |  |  |  |
Series A warrants (Note 10.d) |  |  | 629,039 |  |  |  |  |
Series D warrants (Note 10.e) |  |  | 92,798 |  |  |  |  |
Consulting agreement warrants (Note 10.f) |  |  | 44,932 |  |  |  |  |
Exercised |  |  | (435,169 | ) |  |  |  |
Outstanding warrants, September 30, 2024 |  |  | 890,706 |  |  |  | 3.48 |
|  | Number of Warrants |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Life |
Outstanding warrants, January 1, 2022 |  |  | 12,827 |  |  | $ | 72.12 |  |  |  | 0.85 |
Warrants issued pursuant to issue of convertible debt and preferred shares to individual investors |  |  | 20,642 |  |  |  | 28.85 |  |  |  |  |
Warrants issued pursuant to modification of convertible debt |  |  | 54,782 |  |  |  | 7.21 |  |  |  |  |
Outstanding warrants, December 31, 2022 |  |  | 88,251 |  |  | $ | 21.73 |  |  |  | 2.50 |
Warrants issued pursuant to units offering |  |  | 159,964 |  |  |  | 24.62 |  |  |  |  |
Outstanding warrants, December 31, 2023 |  |  | 248,215 |  |  | $ | 19.90 |  |  |  | 2.46 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2024 |
Stock price |  |  | $6.91 |  |
Risk free rate |  | 3.75% | - | 3.82% |
Dividend yield |  |  | 0% |  |
Expected volatility |  | 86.50% | - | 87.60% |
Expected term (in years) |  | 3.91 | - | 4.93 |
|  | 2023 |  |  | 2022 |
Risk free rate |  |  | 4.35 | % |  |  | 4.5 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 86 | % |  |  | 86 | %
Expected term (in years) |  |  | 3 |  |  |  | 3 |
Expected life (in years) |  |  | 5 |  |  |  | 5 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Stock Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value |
Outstanding Options, December 31, 2023 |  |  | 134,333 |  |  | $ | 20.77 |  |  |  | 6.18 |  |  | $ | - |
Options granted |  |  | 335,728 |  |  |  | 5.18 |  |  |  | - |  |  |  | - |
WaveDancer options |  |  | 113,522 |  |  |  | 82.25 |  |  |  | - |  |  |  | - |
Outstanding Options, September 30, 2024 |  |  | 583,583 |  |  | $ | 23.77 |  |  |  | 3.43 |  |  | $ | - |
|  | Number of Stock Options |  |  | Weighted Average Grant-Date Fair Value |
Non-Vested Options, December 31, 2023 |  |  | 90,988 |  |  | $ | 4.77 |
Options granted |  |  | 335,728 |  |  |  | 4.77 |
Options vested |  |  | (185,704 | ) |  |  | 4.94 |
Non-Vested Options, September 30, 2024 |  |  | 241,012 |  |  | $ | 4.63 |
|  | Number of Stock Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding Options, December 31, 2022 |  |  | 51,558 |  |  | $ | 45.19 |  |  |  | 6.90 |  |  | $ | - |
Options granted |  |  | 82,775 |  |  |  | 5.58 |  |  |  |  |  |  |  |  |
Outstanding Options, December 31, 2023 |  |  | 134,333 |  |  | $ | 20.77 |  |  |  | 6.18 |  |  | $ | - |
|  | Number of Stock Options |  |  | Weighted Average Grant- Date Fair Value |
Non-Vested Options, December 31, 2022 |  |  | 33,889 |  |  | $ | 21.15 |
Options granted |  |  | 82,775 |  |  |  | 0.00 |
Options vested |  |  | (25,676 | ) |  |  | 11.06 |
Non-Vested Options, December 31, 2023 |  |  | 90,988 |  |  | $ | 4.77 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-4 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-5 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481142/505-10-45-2 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-10 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-1 + Details
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