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 |
|
|
2,470,000,000 |
|
|
|
2,470,000,000 |
|
|
|
35,369,877 |
|
|
|
2,552,744 |
|
| Series A Preferred Stock |
|
|
|
|
|
|
|
|
|
|
- |
|
|
|
- |
|
| Series B Preferred Stock |
|
|
30,000,000 |
|
|
|
30,000,000 |
|
|
|
14,578,833 |
|
|
|
- |
|
| Series C Preferred Stock |
|
|
|
|
|
|
|
|
|
|
1,538,134 |
|
|
|
- |
|
|
| 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 |
|
|
123,333 |
|
|
$ |
7.50 |
|
|
|
0.85 |
|
| Warrants issued pursuant to issue of convertible debt and preferred shares to individual investors |
|
|
198,482 |
|
|
|
3.00 |
|
|
|
|
|
| Warrants issued pursuant to modification of convertible debt |
|
|
526,749 |
|
|
|
0.75 |
|
|
|
|
|
| Outstanding warrants, December 31, 2022 |
|
|
848,564 |
|
|
$ |
2.26 |
|
|
|
2.50 |
|
| Warrants issued pursuant to units offering |
|
|
1,538,113 |
|
|
|
2.56 |
|
|
|
|
|
| Outstanding warrants, December 31, 2023 |
|
|
2,386,677 |
|
|
$ |
2.07 |
|
|
|
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 |
|
|
495,746 |
|
|
$ |
4.70 |
|
|
|
6.90 |
|
|
$ |
- |
|
| Options granted |
|
|
795,916 |
|
|
|
0.58 |
|
|
|
|
|
|
|
|
|
| Outstanding Options, December 31, 2023 |
|
|
1,291,662 |
|
|
$ |
2.16 |
|
|
|
6.18 |
|
|
$ |
- |
|
| |
|
Number of Stock Options |
|
|
Weighted Average Grant- Date Fair Value |
|
| Non-Vested Options, December 31, 2022 |
|
|
325,853 |
|
|
$ |
2.20 |
|
| Options granted |
|
|
795,916 |
|
|
|
0.00 |
|
| Options vested |
|
|
(246,883 |
) |
|
|
1.15 |
|
| Non-Vested Options, December 31, 2023 |
|
|
874,886 |
|
|
$ |
0.50 |
|
|