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Note 13 - Equity Incentive Plans (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Cost of revenue |  | $ | 56 |  |  | $ | 173 |  |  | $ | 162 |  |  | $ | 299 |
Research & development |  |  | 183 |  |  |  | 572 |  |  |  | 625 |  |  |  | 1,102 |
Selling, general & administrative |  |  | 2,309 |  |  |  | 3,146 |  |  |  | 4,756 |  |  |  | 6,080 |
Total stock-based compensation expense |  | $ | 2,548 |  |  | $ | 3,891 |  |  | $ | 5,543 |  |  | $ | 7,481 |
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 |  |  | 11,300 |  |  | $ | 13.99 |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  | $ | - |  |  |  |  |  |  | $ | - |
Forfeited and canceled |  |  | (272,468 | ) |  | $ | 34.03 |  |  |  |  |  |  | $ | - |
Outstanding as of June 30, 2025 |  |  | 1,827,872 |  |  | $ | 31.65 |  |  |  | 6.6 |  |  | $ | - |
Vested, June 30, 2025 |  |  | 1,394,669 |  |  | $ | 32.93 |  |  |  | 6.0 |  |  | $ | - |
Vested or expected to vest, June 30, 2025 |  |  | 1,827,872 |  |  | $ | 31.65 |  |  |  | 6.6 |  |  | $ | - |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Six Months Ended |
|  | June 30, |
|  | 2025 |  |  | 2024 |
Risk free interest rate |  |  | 3.8 | % |  |  | - |  |  |  | 4.0 | % |  |  | 3.9 | % |  |  | - |  |  |  | 4.6 | %
Expected volatility |  |  | 41.6 | % |  |  | - |  |  |  | 42.9 | % |  |  | 44.5 | % |  |  | - |  |  |  | 48.2 | %
Expected life (years) |  |  |  |  |  |  | 4.5 |  |  |  |  |  |  |  |  |  |  |  | 4.5 |  |  |  |  |
Expected dividend yield |  |  |  |  |  |  | 0.0 | % |  |  |  |  |  |  |  |  |  |  | 0.0 | % |  |  |  |
Fair value per option |  |  |  |  |  | $ | 5.60 |  |  |  |  |  |  |  |  |  |  | $ | 10.52 |  |  |  |  |
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 |  |  | $ | 14.15 |
Vested |  |  | (311,335 | ) |  | $ | 22.67 |
Forfeited and cancelled |  |  | (123,808 | ) |  | $ | 19.26 |
Outstanding as of June 30, 2025 |  |  | 970,461 |  |  | $ | 21.58 |
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 | ) |  | $ | 10.50 |
Outstanding as of June 30, 2025 |  |  | 279,754 |  |  | $ | 15.55 |

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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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