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Note 13 - Equity Incentive Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Cost of revenue |  | $ | 61 |  |  | $ | 84 |  |  | $ | 223 |  |  | $ | 357 |
Research & development |  |  | 284 |  |  |  | 446 |  |  |  | 909 |  |  |  | 1,447 |
Selling, general & administrative |  |  | 1,870 |  |  |  | 2,588 |  |  |  | 6,626 |  |  |  | 8,104 |
Total stock-based compensation expense |  | $ | 2,215 |  |  | $ | 3,118 |  |  | $ | 7,758 |  |  | $ | 9,908 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Average |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Average |  |  | Contractual |  |  | Intrinsic |
|  | Number of |  |  | Exercise |  |  | Term |  |  | Value |
|  | Options |  |  | Price |  |  | (in years) |  |  | (in thousands) |
Outstanding as of December 31, 2024 |  |  | 2,089,040 |  |  | $ | 32.07 |  |  |  |  |  |  | $ | - |
Granted |  |  | 16,300 |  |  | $ | 12.71 |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  | $ | - |  |  |  |  |  |  | $ | - |
Forfeited and canceled |  |  | (333,240 | ) |  | $ | 34.43 |  |  |  |  |  |  | $ | - |
Outstanding as of September 30, 2025 |  |  | 1,772,100 |  |  | $ | 31.45 |  |  |  | 6.5 |  |  | $ | 1 |
Vested, September 30, 2025 |  |  | 1,349,013 |  |  | $ | 32.64 |  |  |  | 6.0 |  |  | $ | - |
Vested or expected to vest, September 30, 2025 |  |  | 1,772,100 |  |  | $ | 31.45 |  |  |  | 6.5 |  |  | $ | 1 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| Nine Months Ended |
| September 30, |
| 2025 |  | 2024 |
Risk free interest rate |  | 3.7 | % |  | - |  | 4.0 | % |  | 3.6 | % |  | - |  | 4.6 | %
Expected volatility |  | 41.6 | % |  | - |  | 45.7 | % |  | 44.5 | % |  | - |  | 48.2 | %
Expected life (years) |  |  |  |  | 4.5 |  |  |  |  |  |  |  | 4.5 |  |  |
Expected dividend yield |  |  |  |  | 0.0 | % |  |  |  |  |  |  | 0.0 | % |  |
Fair value per option |  |  |  | $ | 5.13 |  |  |  |  |  |  | $ | 10.53 |  |  |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
|  | Number of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Outstanding as of December 31, 2024 |  |  | 836,562 |  |  | $ | 26.70 |
Granted |  |  | 569,042 |  |  | $ | 14.85 |
Vested |  |  | (316,105 | ) |  | $ | 25.82 |
Forfeited and cancelled |  |  | (132,161 | ) |  | $ | 23.15 |
Outstanding as of September 30, 2025 |  |  | 957,338 |  |  | $ | 20.44 |
Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
|  | Number of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Outstanding as of December 31, 2024 |  |  | - |  |  | $ | - |
Granted |  |  | 290,792 |  |  | $ | 15.36 |
Vested |  |  | - |  |  | $ | - |
Forfeited and cancelled |  |  | (11,038 | ) |  | $ | 15.42 |
Outstanding as of September 30, 2025 |  |  | 279,754 |  |  | $ | 15.36 |

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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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