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Note 10 - Equity (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Notes Tables |  |
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 |
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 |
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, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Employees stock options |  | $ | 1,296 |  |  | $ | 78 |  |  | $ | 1,413 |  |  | $ | 226 |
Restricted share units |  |  | 410 |  |  |  | - |  |  |  | 410 |  |  |  | - |
Series D warrants |  |  | 610 |  |  |  | - |  |  |  | 610 |  |  |  | - |
Total |  | $ | 2,316 |  |  | $ | 78 |  |  | $ | 2,433 |  |  | $ | 226 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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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 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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