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Note 17 - Stockholders' Equity (Tables) | 12 Months Ended
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Mar. 31, 2024
Notes Tables |
Share-Based Payment Arrangement, Activity [Table Text Block] |
|  | Year Ended March 31, |
|  | 2024 |  |  | 2023 |
Number of options granted |  |  | 25,000 |  |  |  | 43,000 |
Weighted-average exercise price per share |  | $ | 1.75 |  |  | $ | 1.10 |
Weighted-average grant date fair value per share |  | $ | 1.75 |  |  | $ | 1.10 |
|  | Year Ended March 31, |
|  | 2024 |  |  | 2023 |
Number of units granted |  |  | 2,075,756 |  |  |  | 1,172,380 |
Weighted-average grant date fair value per share |  | $ | 1.71 |  |  | $ | 1.73 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Year Ended March 31, |
|  | 2024 |  |  | 2023 |
Expected volatility |  |  | 88.57 | % |  |  | 78.20% - 83.10% |
Dividend yield |  |  | - | % |  |  | - | %
Risk-free rate |  |  | 4.12 | % |  |  | 3.11% - 3.14% |
Expected term (in years) |  |  | 5.18 |  |  |  | 5.36 - 6.94 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Exercise Price per |
|  | Number of Shares |  |  | Share |
Outstanding as of April 1, 2022 |  |  | 3,565,191 |  |  | $ | 3.78 |
Granted |  |  | 43,000 |  |  |  | 1.10 |
Forfeited or expired |  |  | (1,191,524 | ) |  |  | 3.71 |
Outstanding as of March 31, 2023 |  |  | 2,416,667 |  |  |  | 3.75 |
Granted |  |  | 25,000 |  |  |  | 1.75 |
Exercised |  |  | (10,000 | ) |  |  | 0.81 |
Forfeited or expired |  |  | (165,000 | ) |  |  | 3.88 |
Outstanding as of March 31, 2024 |  |  | 2,266,667 |  |  | $ | 3.73 |
Exercisable as of March 31, 2024 |  |  | 2,224,167 |  |  | $ | 3.74 |
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Exercise Price per |
|  | Number of Shares |  |  | Share |
Outstanding as of April 1, 2022 |  |  | 25,000 |  |  | $ | 4.00 |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |
Forfeited or expired |  |  | - |  |  |  | - |
Outstanding as of March 31, 2023 |  |  | 25,000 |  |  |  | 4.00 |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |
Forfeited or expired |  |  | - |  |  |  | - |
Outstanding as of March 31, 2024 |  |  | 25,000 |  |  | $ | 4.00 |
Exercisable as of March 31, 2024 |  |  | 25,000 |  |  | $ | 4.00 |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | Number of Shares |
Outstanding as of April 1, 2022 |  |  | 3,064,285 |
Granted |  |  | 1,172,380 |
Vested |  |  | (2,136,679 | )
Cancelled |  |  | (429,011 | )
Outstanding as of March 31, 2023 |  |  | 1,670,975 |
Granted |  |  | 2,075,756 |
Vested |  |  | (1,850,576 | )
Cancelled |  |  | (50,000 | )
Outstanding as of March 31, 2024 |  |  | 1,846,155 |

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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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- 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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