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Stock-based compensation (Tables) | 6 Months Ended
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Sep. 30, 2024
Stock-based compensation [Abstract] |
Activities of Stock Option Plan | The following table summarizes information about activities within the Stock Option Plan for the six months period ended September 30, 2024:
|  | Number of options |  |  | Weighted-average exercise price |  |  | Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (in thousands) |
|  |  |  |  | $ |  |  |  |  |  |  | $ |
Outstanding, March 31, 2024 |  |  | 721,793 |  |  |  | 3.68 |  |  |  | 9.08 |  |  |  | 527 |
Granted |  |  | 198,130 |  |  |  | 2.96 |  |  |  | — |  |  |  | — |
Outstanding, September 30, 2024 |  |  | 919,923 |  |  |  | 3.53 |  |  |  | 8.80 |  |  |  | 294 |
Exercisable, September 30, 2024 |  |  | 453,681 |  |  |  | 4.22 |  |  |  | 8.48 |  |  |  | 162 |
Weighted-Average Assumptions of Options Granted | The weighted-average grant date fair value of awards for options granted during the six months ended September 30, 2024 was $2.52. The fair value of options granted was estimated using the Black-Scholes option pricing model, resulting in the following weighted-average assumptions for the options granted:
|  | September 30, 2024 |  |  | September 30, 2023 |
|  | Weighted-average |  |  | Weighted-average |
Exercise price |  | $ | 2.96 |  |  | $ | 2.96 |
Share price |  | $ | 2.96 |  |  | $ | 2.78 |
Dividend |  |  | — |  |  |  | — |
Risk-free interest |  |  | 4.43 | % |  |  | 4.94 | %
Estimated life (years) |  |  | 5.81 |  |  |  | 2.53 |
Expected volatility |  |  | 114.37 | % |  |  | 84.36 | %
Compensation Expense Recognized Under Stock Option Plan | Compensation expense recognized under the Stock Option Plan is summarized as follows:
|  | Three months ended |  |  | Six months ended |
|  | September 30, 2024 |  |  | September 30, 2023 |  |  | September 30, 2024 |  |  | September 30, 2023 |
|  |  | $ |  |  |  | $ |  |  |  | $ |  |  |  | $ |
Research and development expenses |  |  | 60 |  |  |  | 82 |  |  |  | 126 |  |  |  | 84 |
General and administrative expenses |  |  | 142 |  |  |  | 198 |  |  |  | 314 |  |  |  | 274 |
|  |  | 202 |  |  |  | 280 |  |  |  | 440 |  |  |  | 358 |

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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 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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