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Note 5 - Stock-based Compensation (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 |
Stock-based compensation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of revenue |  | $ | 336 |  |  | $ | 154 |  |  | $ | 726 |  |  | $ | 563 |
Sales and marketing |  |  | 577 |  |  |  | 688 |  |  |  | 1,727 |  |  |  | 2,198 |
Research, development and engineering |  |  | 1,244 |  |  |  | 648 |  |  |  | 2,872 |  |  |  | 1,911 |
General and administrative |  |  | 1,708 |  |  |  | 1,212 |  |  |  | 3,571 |  |  |  | 3,267 |
Stock-based compensation expense |  |  | 3,865 |  |  |  | 2,702 |  |  |  | 8,896 |  |  |  | 7,939 |
Capitalized to software and patent costs |  |  | 61 |  |  |  | 5 |  |  |  | 115 |  |  |  | 25 |
Total stock-based compensation |  | $ | 3,926 |  |  | $ | 2,707 |  |  | $ | 9,011 |  |  | $ | 7,964 |
Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block] |
|  | September 30, |  |  | December 31, |
|  | 2025 |  |  | 2024 |
Total unrecognized compensation costs |  | $ | 15,491 |  |  | $ | 16,226 |
Employee Service Share Based Compensation Non Vested Awards Compensation Cost Not Yet Recognized Period for Recognition [Table Text Block] |
|  | RSAs |  |  | RSUs |  |  | PRSUs |
Weighted average period (in years) |  |  | 1.06 |  |  |  | 1.47 |  |  |  | 1.41 |
Nonvested Restricted Stock Shares Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
Three Months Ended September 30, 2025: |  | Shares |  |  | Fair Value |
Unvested balance at June 30, 2025 |  |  | 74 |  |  | $ | 18.15 |
Granted |  |  | 22 |  |  | $ | 12.27 |
Vested |  |  | (5 | ) |  | $ | 19.52 |
Forfeited |  |  | — |  |  | $ | — |
Unvested balance at September 30, 2025 |  |  | 91 |  |  | $ | 16.59 |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
Nine Months Ended September 30, 2025: |  | Shares |  |  | Fair Value |
Unvested balance at December 31, 2024 |  |  | 59 |  |  | $ | 29.98 |
Granted |  |  | 69 |  |  | $ | 12.69 |
Vested |  |  | (37 | ) |  | $ | 30.61 |
Forfeited |  |  | — |  |  | $ | — |
Unvested balance at September 30, 2025 |  |  | 91 |  |  | $ | 16.59 |
Schedule of Fair Value of Restricted Stock Awards Vested [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Fair value of RSAs vested |  | $ | 73 |  |  | $ | 308 |  |  | $ | 668 |  |  | $ | 2,069 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
Three Months Ended September 30, 2025: |  | Shares |  |  | Fair Value |
Unvested balance at June 30, 2025 |  |  | 679 |  |  | $ | 16.25 |
Granted |  |  | 98 |  |  | $ | 8.98 |
Vested |  |  | (120 | ) |  | $ | 16.46 |
Forfeited |  |  | (41 | ) |  | $ | 19.69 |
Unvested balance at September 30, 2025 |  |  | 616 |  |  | $ | 14.83 |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
Nine Months Ended September 30, 2025: |  | Shares |  |  | Fair Value |
Unvested balance at December 31, 2024 |  |  | 406 |  |  | $ | 28.27 |
Granted |  |  | 673 |  |  | $ | 13.09 |
Vested |  |  | (267 | ) |  | $ | 18.81 |
Forfeited |  |  | (196 | ) |  | $ | 26.30 |
Unvested balance at September 30, 2025 |  |  | 616 |  |  | $ | 14.83 |
Schedule of Fair Value of Restricted Stock Units Vested [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Fair value of RSU awards vested |  | $ | 1,082 |  |  | $ | 1,356 |  |  | $ | 4,119 |  |  | $ | 4,403 |
Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
Three Months Ended September 30, 2025: |  | Shares |  |  | Fair Value |
Unvested balance at June 30, 2025 |  |  | 560 |  |  | $ | 18.49 |
Change in units based on performance expectations |  |  | — |  |  | $ | — |
Granted |  |  | 3 |  |  | $ | 8.81 |
Vested |  |  | — |  |  | $ | — |
Forfeited |  |  | (39 | ) |  | $ | 18.18 |
Unvested balance at September 30, 2025 |  |  | 524 |  |  | $ | 18.45 |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
Nine Months Ended September 30, 2025: |  | Shares |  |  | Fair Value |
Unvested balance at December 31, 2024 |  |  | 215 |  |  | $ | 32.08 |
Change in units based on performance expectations |  |  | (5 | ) |  | $ | 42.43 |
Granted |  |  | 421 |  |  | $ | 15.20 |
Vested |  |  | (49 | ) |  | $ | 42.43 |
Forfeited |  |  | (58 | ) |  | $ | 23.04 |
Unvested balance at September 30, 2025 |  |  | 524 |  |  | $ | 18.45 |
Schedule of Fair Value of Performance Stock Units Vested [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Fair value of PRSU awards vested |  | $ | — |  |  | $ | — |  |  | $ | 1,707 |  |  | $ | 2,370 |
Performance Shares [Member] |
Notes Tables |
Schedule of Share-Based Payment Award, Valuation Assumptions [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Stock price |  | $ | — |  |  | $ | — |  |  | $ | 13.16 |  |  | $ | 36.64 |
Expected volatility |  |  | — |  |  |  | — |  |  |  | 70.9 | % |  |  | 66.3 | %
Risk-free interest rate |  |  | — |  |  |  | — |  |  |  | 3.8 | % |  |  | 4.3 | %

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