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Share-Based Payments | 9 Months Ended
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Jan. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Share-Based Payments | Share-Based Payments 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 |  |
The Company has in place a 2021 Equity Incentive Plan and 2010 Equity Incentive Plan ("the Plans"). In general, these plans provide for stock-based compensation to the Company’s employees, directors and non-employees. The plans also provide for limits on the aggregate number of shares that may be granted, the term of grants and the strike price of option awards. 2021 Equity Incentive Plan As part of the 2021 Annual Shareholders Meeting, shareholders approved the adoption of the 2021 Equity Incentive Plan (“2021 Equity Plan”). The purpose of the 2021 Equity Plan is to grant (i) Non-statutory Stock Options; (ii) Incentive Stock Options; (iii) Restricted Stock Awards; and/or (iv) Stock Appreciation Rights (collectively, stock-based compensation) to its employees, directors and non-employees. Total stock awards under the 2021 Equity Plan shall not exceed 2 million shares of common stock. Options and Stock Appreciation Rights expire no later than ten years from the date of grant and the awards vest as determined by the Board of Directors. Options and Stock Appreciation Rights have a strike price not less than 100% of the fair market value of the common stock subject to the option or right at the date of grant. As of January 31, 2023, approximately 1.7 million shares were left to issue under this plan. 2010 Equity Incentive Plan On February 18, 2011, shareholders owning a majority of the issued and outstanding shares of the Company executed a written consent approving the 2010 Equity Incentive Plan (“2010 Equity Plan”). The purpose of the 2010 Equity Plan is to grant (i) Non-statutory Stock Options; (ii) Restricted Stock Awards; and (iii) Stock Appreciation Rights (collectively, stock-based compensation) to its employees, directors and non-employees. Total stock awards under the 2010 Equity Plan shall not exceed 30 million shares of common stock. Options and Stock Appreciation Rights expire no later than ten years from the date of grant and the awards vest as determined by the Board of Directors. Options and Stock Appreciation Rights have a strike price not less than 100% of the fair market value of the common stock subject to the option or right at the date of grant. After February 2021, no more shares were available to be issued from this plan. Stock Option Grants 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 | —% |  | —% |  | —% |  | —% |
The weighted average fair value of stock options granted during the three months ended January 31, 2023 and 2022 was $4.20 and $5.80, respectively, and the nine months ended January 31, 2023 and 2022 was $4.33 and $5.56, respectively. 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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