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Share-Based Payments (Tables) | 6 Months Ended
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Oct. 31, 2022
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, |
| 2022 |  | 2021 |  | 2022 |  | 2021 |
General and administrative | $ | 23 |  |  | $ | 48 |  |  | $ | 146 |  |  | $ | 219 |  |
Sales and marketing | 49 |  |  | 45 |  |  | 97 |  |  | 96 |  |
Research and development | 4 |  |  | 8 |  |  | 7 |  |  | 14 |  |
Cost of oncology services | 43 |  |  | 33 |  |  | 75 |  |  | 85 |  |
Total stock-based compensation expense | $ | 119 |  |  | $ | 134 |  |  | $ | 325 |  |  | $ | 414 |  |
Summary of valuation assumptions for stock options | Black-Scholes assumptions used to calculate the fair value of options granted during the six months ended October 31, 2022 and 2021 were as follows:
|  |  | Six Months Ended October 31, |
|  |  |  |  | 2022 |  | 2021 |
Expected term in years |  |  |  |  | 6 |  | 6 |
Risk-free interest rates |  |  |  |  | 2.87% |  | 0.82% |
Volatility |  |  |  |  | 62.58% |  | 65.94%-66.21% |
Dividend yield |  |  |  |  | —% |  | —% |
Summary of stock option activity | The Company’s stock options activity for the six months ended October 31, 2022 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, 2022 | 1,617,324 |  | 40,915 |  |  |  | 1,658,239 |  |  | $ | 4.51 |  |  | 4.9 |  | $ | 6,131,000 |
Granted | 80,500 |  | — |  |  |  | 80,500 |  |  | 7.57 |  |  | 9.7 |  |
Exercised | (36,209) |  | — |  |  |  | (36,209) |  |  | 3.21 |  |  |  |  |
Forfeited | (9,125) |  | — |  |  |  | (9,125) |  |  | 7.94 |  |  |  |  |
Canceled | (13,374) |  | — |  |  |  | (13,374) |  |  | 3.74 |  |  |  |  |
Expired | — |  | (4,584) |  |  |  | (4,584) |  |  | 5.40 |  |  |  |  |
Outstanding, October 31, 2022 | 1,639,116 |  | 36,331 |  |  |  | 1,675,447 |  |  | 4.67 |  |  | 4.8 |  | $ | 4,989,000 |
Vested and expected to vest as of October 31, 2022 | 1,639,116 |  | 36,331 |  |  |  | 1,675,447 |  |  | 4.67 |  |  | 4.8 |  | $ | 4,989,000 |
Exercisable as of October 31, 2022 | 1,363,447 |  | — |  |  |  | 1,363,447 |  |  | 4.18 |  |  | 4.1 |  | $ | 4,788,000 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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