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Share-Based Payments (Tables) | 6 Months Ended
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Oct. 31, 2020
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, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019 |  |  |  |
General and administrative | $ | 10 |  |  | $ | 39 |  |  | $ | 57 |  |  | $ | 171 |  |  |  |  |
Sales and marketing | 49 |  |  | 27 |  |  | 97 |  |  | 49 |  |  |  |  |
Research and development | 5 |  |  | 2 |  |  | 9 |  |  | 5 |  |  |  |  |
Cost of oncology services | 21 |  |  | 9 |  |  | 42 |  |  | (17) |  |  |  |  |
Total stock-based compensation expense | $ | 85 |  |  | $ | 77 |  |  | $ | 205 |  |  | $ | 208 |  |  |  |  |
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, 2020 and 2019 were as follows:
| Three Months Ended October 31, |  | Six Months Ended October 31, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019 |  |  |  |
Expected term in years | 6 |  | 6 |  | 6 |  | 6 |  |  |  |
Risk-free interest rates | 0.27% |  | 1.57% |  | 0.27%-0.39% |  | 1.57% |  |  |  |
Volatility | 72.83% |  | 71.11% |  | 72.64%-72.83% |  | 71.11% |  |  |  |
Dividend yield | —% |  | —% |  | —% |  | —% |  |  |  |
Summary of stock option activity | The Company’s stock options activity for the six months ended October 31, 2020 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, 2020 | 2,228,326 |  | 43,332 |  |  |  | 2,271,658 |  |  | $ | 3.23 |  |  | 5.0 |  | $ | 10,663,000 |
Granted | 60,000 |  | — |  |  |  | 60,000 |  |  | 7.29 |  |  | 9.84 |  |
Exercised | (640,657) |  | (1,160) |  |  |  | (641,817) |  |  | 2.24 |  |  |  |  |
Forfeited | (5,500) |  | — |  |  |  | (5,500) |  |  | 6.76 |  |  |  |  |
Canceled | (26,106) |  | (923) |  |  |  | (27,029) |  |  | 4.00 |  |  |  |  |
Expired | — |  | (5,834) |  |  |  | (5,834) |  |  | 10.80 |  |  |  |  |
Outstanding, October 31, 2020 | 1,616,063 |  | 35,415 |  |  |  | 1,651,478 |  |  | 3.71 |  |  | 5.83 |  | $ | 8,641,000 |
Vested and expected to vest as of October 31, 2020 | 1,616,063 |  | 35,415 |  |  |  | 1,651,478 |  |  | 3.71 |  |  | 5.83 |  | $ | 8,641,000 |
Exercisable as of October 31, 2020 | 1,303,396 |  | 9,584 |  |  |  | 1,312,980 |  |  | 3.15 |  |  | 5.12 |  | $ | 7,660,000 |

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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=115993241&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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