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Share-Based Payments (Tables) | 9 Months Ended
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Jan. 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 January 31, |  | Nine Months Ended January 31, |
| 2023 |  | 2022 |  | 2023 |  | 2022 |
General and administrative | $ | 235 |  |  | $ | 223 |  |  | $ | 380 |  |  | $ | 442 |  |
Sales and marketing | 50 |  |  | 53 |  |  | 148 |  |  | 149 |  |
Research and development | 6 |  |  | 3 |  |  | 13 |  |  | 17 |  |
Cost of oncology services | 40 |  |  | 31 |  |  | 115 |  |  | 116 |  |
Total stock-based compensation expense | $ | 331 |  |  | $ | 310 |  |  | $ | 656 |  |  | $ | 724 |  |
Summary of valuation assumptions for stock options | Black-Scholes assumptions used to calculate the fair value of options granted during the three and nine months ended January 31, 2023 and 2022 were as follows:
| Three Months Ended January 31, |  | Nine Months Ended January 31, |
| 2023 |  | 2022 |  | 2023 |  | 2022 |
Expected term in years | 6 |  | 6 |  | 6 |  | 6 |
Risk-free interest rates | 3.70% |  | 1.11% - 1.20% |  | 2.87% - 3.70% |  | 0.82% - 1.20% |
Volatility | 61.88% |  | 64.37% - 64.62% |  | 61.88% - 62.58% |  | 64.37%-66.21% |
Dividend yield | —% |  | —% |  | —% |  | —% |
Summary of stock option activity | The Company’s stock options activity for the nine months ended January 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, 2022 | 1,617,324 |  | 40,915 |  |  |  | 1,658,239 |  |  | $ | 4.51 |  |  | 4.9 |  | $ | 6,131,000 |
Granted | 184,720 |  | — |  |  |  | 184,720 |  |  | 7.25 |  |  | 9.6 |  |
Exercised | (36,209) |  | — |  |  |  | (36,209) |  |  | 3.21 |  |  |  |  |
Forfeited | (9,125) |  | — |  |  |  | (9,125) |  |  | 7.94 |  |  |  |  |
Canceled | (13,874) |  | — |  |  |  | (13,874) |  |  | 3.93 |  |  |  |  |
Expired | — |  | (4,584) |  |  |  | (4,584) |  |  | 5.40 |  |  |  |  |
Outstanding, January 31, 2023 | 1,742,836 |  | 36,331 |  |  |  | 1,779,167 |  |  | 4.81 |  |  | 4.8 |  | $ | 1,896,000 |
Vested and expected to vest as of January 31, 2023 | 1,742,836 |  | 36,331 |  |  |  | 1,779,167 |  |  | 4.81 |  |  | 4.8 |  | $ | 1,896,000 |
Exercisable as of January 31, 2023 | 1,389,002 |  | 1,875 |  |  |  | 1,390,877 |  |  | 4.24 |  |  | 3.9 |  | $ | 1,896,000 |

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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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