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Stockholders' Equity (Tables) | 12 Months Ended
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May 31, 2023
Equity [Abstract] |
Schedule summarizes stock option activity | The following table summarizes information about stock option activity for the fiscal year ended May 31, 2023:
| Shares |  | Weighted average exercise price |  | Weighted average remaining contractual life |  | Aggregate intrinsic value (in thousands)
Outstanding at beginning of year - June 1, 2022 | 2,346,248 |  |  | $ | 17.13 |  |  |  |  |
Granted | 187,826 |  |  | $ | 21.54 |  |  |  |  |
Exercised | (47,824) |  |  | $ | 14.79 |  |  |  |  |
Forfeited | (79,701) |  |  | $ | 20.02 |  |  |  |  |
Expired | (200,000) |  |  | $ | 12.14 |  |  |  |  |
Outstanding at end of year - May 31, 2023 | 2,206,549 |  |  | $ | 17.90 |  |  | 5.89 |  | $ | — |
Options exercisable at year-end | 1,408,208 |  |  | $ | 17.12 |  |  | 4.77 |  | $ | — |
Options expected to vest in future periods | 798,341 |  |  | $ | 19.28 |  |  | 7.86 |  | $ | — |
Share based compensation arrangement by share based payment award nonvested shares and weighted average grant date fair value | The following table summarizes information about restricted stock unit activity for the year ended May 31, 2023:
| Restricted Stock Units |  | Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2022 | 670,017 |  |  | $ | 18.36 |
Granted | 379,572 |  |  | $ | 19.99 |
Vested | (275,007) |  |  | $ | 20.29 |
Canceled | (38,562) |  |  | $ | 19.28 |
Non-vested at end of year, May 31, 2023 | 736,020 |  |  |
The following table summarizes information about performance unit award activity for the year ended May 31, 2023:
| Performance Unit Awards |  | Weighted Average Grant-Date Fair Value
Non-vested at beginning of year, June 1, 2022 | 449,473 |  |  | $ | 17.02 |
Granted | 175,386 |  |  | $ | 21.53 |
Vested | (45,008) |  |  | $ | 20.54 |
Canceled | (31,321) |  |  | $ | 20.16 |
Non-vested at end of year, May 31, 2023 | 548,530 |  |  | $ | 19.23 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following tables represents the break out of stock-based compensation included in the Company's Consolidated Statement of Operations:
| Year ended May 31,
(in thousands) | 2023 |  | 2022 |  | 2021
Cost of sales | $ | 793 |  |  | $ | 827 |  |  | $ | 768 |
Research and development | 1,459 |  |  | 1,298 |  |  | 1,152 |
Sales and marketing | 2,922 |  |  | 2,568 |  |  | 1,641 |
General and administrative | 5,984 |  |  | 5,999 |  |  | 5,064 |
| $ | 11,158 |  |  | $ | 10,692 |  |  | $ | 8,625 |

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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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