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Preferred and Common Stock (Tables) | 12 Months Ended
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Apr. 30, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Restricted Stock and Restricted Stock Unit Grants | The following table summarizes the equity-related grants made during the three-year period ended April 30, 2020:
Date of Grant | Type of Grant | Shares Granted | Recipients | Vesting Date | Fair Value at Grant Date
June 1, 2017 | Restricted Stock Units | 63,699 |  | Key Employees | June 1, 2020 | $7,388
July 14, 2017 | Restricted Stock Units (1) | 61,126 |  | Officers | June 15, 2020 | $6,912
September 28, 2017 | Restricted Stock | 8,344 |  | Non-Employee Board Members | Immediate | $920
March 29, 2018 | Restricted Stock Units | 2,150 |  | Non-Employee Board Members | September 21, 2018 | $236
May 24, 2018 | Restricted Stock Units | 88,846 |  | Key Employees | May 24, 2021 | $8,593
June 8, 2018 | Restricted Stock Units (1) | 75,402 |  | Officers | June 8, 2021 | $7,571
September 5, 2018 | Restricted Stock Units | 7,984 |  | Non-Employee Board Members | 2019 Annual Shareholders' Meeting Date | $920
June 4, 2019 | Restricted Stock Units | 75,959 |  | Key Employees | June 4, 2022 | $9,886
June 4, 2019 | Restricted Stock Units (1) | 59,579 |  | Officers | June 4, 2022 | $9,097
June 24, 2019 | Restricted Stock Units (2) | 32,786 |  | CEO | Various (2) | $5,700
September 4, 2019 | Restricted Stock Units | 5,504 |  | Non-Employee Board Members | 2020 Annual Shareholders' Meeting Date | $919
December 23, 2019 | Restricted Stock Units (3) | 5,000 |  | CEO | Various (3) | $788
Various (4) | Restricted Stock Units (4) | 8,444 |  | Officers | Various (4) | $1,368
Various (5) | Restricted Stock Units (5) | 1,763 |  | Officers | Various (5) | $354
(1) This grant of restricted stock units includes time-based, performance-based and market-based awards. The performance-based awards included in the figure above represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three-year performance period and will range from 0% to 200% of the “target". The market-based awards incorporate market conditions in determining fair value as of the grant date, and will also range from 0% to 200% of the "target". Total market-based expense of approximately $2.3 million for the 2017 grant, $2.6 million for the 2018 grant, and $3.1 million for the 2019 grant will be recognized on a straight-line basis over the vesting period, subject to acceleration for retirement provisions. (2) This grant of restricted stock units is comprised of time-based awards that vest ratably on each June 23, 2020 through 2022, along with a market-based award vesting June 23, 2022. The market-based award incorporates market conditions in determining fair value on the grant date and will range from 0% to 200% of the target. Total market-based expense of approximately $1.8 million will be recognized on a straight-line basis over the vesting period. (3) This grant of restricted stock units is comprised of performance-based awards which are calculated based upon targets achieved over performance periods from January 1, 2020 to December 31, 2020. If the performance targets are met, the units vest ratably on each January 15, 2021 through 2023. (4) These grants of restricted stock units were issued to various officers throughout the fiscal year. The grants were comprised of time-based awards and vest in accordance with the agreements, ranging from January 2021 to January 2023. (5) These grants of restricted stock units were issued to various officers throughout the fiscal year. The grants includes time-based, performance-based and market-based awards. The performance-based awards included in the figure above represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three-year performance period and will range from 0% to 200% of the “target". The market-based awards incorporate market conditions in determining fair value as of the grant date, and will also range from 0% to 200% of the "target". Total market-based expense of approximately $177 will be recognized on a straight-line basis over the vesting period.
Schedule of Stock Options Activity | Information concerning the issuance of stock options under the 2009 Plan is presented in the following table (no stock option awards have been granted under the 2018 Plan):
| Number of option shares |  | Weighted average option exercise price
Outstanding at April 30, 2017 | 222,050 |  |  | $ | 38.51 |
Exercised | (40,377 | ) |  | 34.11 |
Outstanding at April 30, 2018 | 181,673 |  |  | $ | 39.48 |
Exercised | (71,546 | ) |  | 32.02 |
Forfeited | (300 | ) |  | 25.26 |
Outstanding at April 30, 2019 | 109,827 |  |  | $ | 44.39 |
Exercised | (66,638 | ) |  | 44.39 |
Outstanding at April 30, 2020 | 43,189 |  |  | $ | 44.39 |
Schedule of Restricted Stock Units Award Activity | Information concerning the issuance of restricted stock units under the 2018 Plan and the 2009 Plan is presented in the following table:
Unvested at April 30, 2017 | 303,400 |
Granted | 126,980 |
Vested | (88,700 | )
Forfeited | (2,699 | )
Unvested at April 30, 2018 | 338,981 |
Granted | 172,232 |
Vested | (104,166 | )
Forfeited | (10,530 | )
Performance Award Adjustments | (7,717 | )
Unvested at April 30, 2019 | 388,800 |
Granted | 189,035 |
Vested | (108,484 | )
Forfeited | (25,146 | )
Performance Award Adjustments | 29,594 |
Unvested at April 30, 2020 | 473,799 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&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 http://asc.fasb.org/extlink&oid=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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