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Share-Based Payments (Tables) | 6 Months Ended
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Oct. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Summary of allocation of share based compensation expense | Stock-based compensation expense was recognized as follows (table in thousands):
| Three Months Ended October 31, |  | Six Months Ended October 31, |
| 2023 |  | 2022 |  | 2023 |  | 2022 |
General and administrative | $ | 31 |  |  | $ | 23 |  |  | $ | 215 |  |  | $ | 146 |  |
Sales and marketing | 21 |  |  | 49 |  |  | 87 |  |  | 97 |  |
Research and development | 1 |  |  | 4 |  |  | 12 |  |  | 7 |  |
Cost of oncology services | — |  |  | 43 |  |  | 162 |  |  | 75 |  |
Total stock-based compensation expense | $ | 53 |  |  | $ | 119 |  |  | $ | 476 |  |  | $ | 325 |  |
Summary of valuation assumptions for stock options | Black-Scholes assumptions used to calculate the fair value of options granted during the three and six months ended October 31, 2023 and 2022 were as follows:
| Three Months Ended October 31, |  | Six Months Ended October 31, |
| 2023 |  | 2022 |  | 2023 |  | 2022 |
Expected term in years | 6 |  | 6 |  | 6 |  | 6 |
Risk-free interest rates | 4.49% |  | 0.00% |  | 3.95% - 4.49% |  | 2.87% |
Volatility | 63.30% |  | 0.00% |  | 62.83% - 63.30% |  | 62.58% |
Dividend yield | —% |  | —% |  | —% |  | —% |
Summary of stock option activity | The Company’s stock options activity for the six months ended October 31, 2023 was a s follows:
| Directors and Employees | Non- Employees |  |  | Total |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value
Outstanding, April 30, 2023 | 1,739,336 |  | 36,331 |  |  |  | 1,775,667 |  |  | $ | 4.80 |  |  | 4.6 |  | $ | 2,683,000 |
Granted | 279,100 |  | — |  |  |  | 279,100 |  |  | 6.40 |  |  | 9.9 |  |
Exercised | (155,449) |  | — |  |  |  | (155,449) |  |  | 2.31 |  |  |  |  |
Forfeited | (32,000) |  | — |  |  |  | (32,000) |  |  | 5.86 |  |  |  |  |
Canceled | (34,618) |  | — |  |  |  | (34,618) |  |  | 3.98 |  |  |  |  |
Expired | (833) |  | — |  |  |  | (833) |  |  | 15.96 |  |  |  |  |
Outstanding, October 31, 2023 | 1,795,536 |  | 36,331 |  |  |  | 1,831,867 |  |  | 5.25 |  |  | 4.6 |  | $ | 2,685,000 |
Vested and expected to vest as of October 31, 2023 | 1,795,536 |  | 36,331 |  |  |  | 1,831,867 |  |  | 5.25 |  |  | 4.6 |  | $ | 2,685,000 |
Exercisable as of October 31, 2023 | 1,478,204 |  | 1,875 |  |  |  | 1,480,079 |  |  | 4.91 |  |  | 4.0 |  | $ | 2,675,000 |

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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -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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