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Note 4 - Stock-based Compensation (Tables) | 9 Months Ended
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Dec. 31, 2025
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended December 31, |  |  | Nine Months Ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Cost of revenues |  | $ | 269 |  |  | $ | 211 |  |  | $ | 875 |  |  | $ | 309 |
Research and development |  |  | 504 |  |  |  | 442 |  |  |  | 1,703 |  |  |  | 697 |
Selling, general and administrative |  |  | 3,049 |  |  |  | 2,208 |  |  |  | 9,536 |  |  |  | 3,927 |
Total |  | $ | 3,822 |  |  | $ | 2,861 |  |  | $ | 12,114 |  |  | $ | 4,933 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Nine Months Ended December 31, |
|  | 2025 |
Expected volatility |  |  | 74.01 | %
Risk-free interest rate |  |  | 4.19 | %
Expected life (years) |  |  | 6.31 |
Dividend yield |  | None |

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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 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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