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Share-Based Payments (Tables) | 6 Months Ended
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Oct. 31, 2021
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, |  |
| 2021 |  | 2020 |  | 2021 |  | 2020 |  |  |  |
General and administrative | $ | 48 |  |  | $ | 10 |  |  | $ | 219 |  |  | $ | 57 |  |  |  |  |
Sales and marketing | 45 |  |  | 49 |  |  | 96 |  |  | 97 |  |  |  |  |
Research and development | 8 |  |  | 5 |  |  | 14 |  |  | 9 |  |  |  |  |
Cost of oncology services | 33 |  |  | 21 |  |  | 85 |  |  | 42 |  |  |  |  |
Total stock-based compensation expense | $ | 134 |  |  | $ | 85 |  |  | $ | 414 |  |  | $ | 205 |  |  |  |  |
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, 2021 and 2020 were as follows:
| Three Months Ended October 31, |  | Six Months Ended October 31, |  |
| 2021 |  | 2020 |  | 2021 |  | 2020 |  |  |  |
Expected term in years | — |  | 6 |  | 6 |  | 6 |  |  |  |
Risk-free interest rates | —% |  | 0.27% | 0 | 0.82%-—% |  | 0.27%-0.39% |  |  |  |
Volatility | —% |  | 72.83% |  | 65.94%-66.21% |  | 72.64%-72.83% |  |  |  |
Dividend yield | —% |  | —% |  | —% |  | —% |  |  |  |
Summary of stock option activity | The Company’s stock options activity for the six months ended October 31, 2021 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, 2021 | 1,618,231 |  | 35,415 |  |  |  | 1,653,646 |  |  | $ | 3.96 |  |  | 5.42 |  | $ | 11,384,000 |
Granted | 82,532 |  | 3,000 |  |  |  | 85,532 |  |  | 9.01 |  |  | 9.65 |  |
Exercised | (82,078) |  | — |  |  |  | (82,078) |  |  | 1.91 |  |  |  |  |
Forfeited | (12,500) |  | — |  |  |  | (12,500) |  |  | 6.74 |  |  |  |  |
Canceled | (4,672) |  | — |  |  |  | (4,672) |  |  | 3.36 |  |  |  |  |
Expired | — |  | (5,000) |  |  |  | (5,000) |  |  | 9.60 |  |  |  |  |
Outstanding, October 31, 2021 | 1,601,513 |  | 33,415 |  |  |  | 1,634,928 |  |  | 4.29 |  |  | 5.27 |  | $ | 9,246,000 |
Vested and expected to vest as of October 31, 2021 | 1,601,513 |  | 33,415 |  |  |  | 1,634,928 |  |  | 4.29 |  |  | 5.27 |  | $ | 9,246,000 |
Exercisable as of October 31, 2021 | 1,296,094 |  | 4,584 |  |  |  | 1,300,678 |  |  | 3.69 |  |  | 4.51 |  | $ | 8,189,000 |

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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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + 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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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