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Stock Options and Share-Based Compensation (Tables) | 12 Months Ended
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Apr. 30, 2019
Equity [Abstract] |
Summary of RSU Activity and Weighted Average Exercise Price | The following table summarizes the RSUs activities and weighed averages.
|  | 2019 |  | 2018
|  | Number of RSUs |  | Weighted Average Grant Date Fair Value |  | Number of RSUs |  | Weighted Average Grant Date Fair Value
Outstanding at beginning of year |  | 23,907 |  |  | $ | 23.74 |  |  | — |  |  |
Granted |  | 19,738 |  |  | $ | 32.58 |  |  | 23,907 |  |  | $ | 23.74 |
Vested |  | (2,390 | ) |  | $ | 34.16 |  |  | — |  |  | — |
Forfeited |  | (17,947 | ) |  | $ | 27.07 |  |  | — |  |  |
Outstanding at end of year |  | 23,308 |  |  | $ | 28.66 |  |  | 23,907 |  |  | $ | 23.74 |
Summary of Stock Option Activity and Weighted Average Exercise Price | Stock option activity and weighted average exercise price are summarized as follows:
| 2019 |  | 2018 |
| Number of Shares |  | Weighted Average Exercise Price |  | Number of Shares |  | Weighted Average Exercise Price |
Outstanding at beginning of year | 137,250 |  |  | $ | 18.01 |  |  | 180,350 |  |  | $ | 17.29 |  |
Canceled | (13,100 | ) |  | 21.03 |  |  | (6,300 | ) |  | 19.09 |  |
Exercised | (19,800 | ) |  | 14.54 |  |  | (36,800 | ) |  | 14.31 |  |
Outstanding at end of year | 104,350 |  |  | $ | 18.28 |  |  | 137,250 |  |  | $ | 18.01 |  |
Exercisable at end of year | 84,550 |  |  | $ | 17.63 |  |  | 79,100 |  |  | $ | 16.28 |  |
Summary of Options Outstanding, Exercisable, and Weighted Average Exercise Prices within Exercise Price Range | The number of options outstanding, exercisable, and their weighted average exercise prices were within the following ranges at April 30, 2019:
| Exercise Price Range
| $8.59-$11.78 |  | $15.85-$23.62
Options outstanding | 7,450 |  |  | 96,900 |
Weighted average exercise price | $ | 10.76 |  |  | $ | 18.86 |
Weighted average remaining contractual life | 2.63 years |  |  | 5.68 years |
Aggregate intrinsic value | $ | 88,000 |  |  | $ | 392,000 |
Options exercisable | 7,450 |  |  | 77,100 |
Weighted average exercise price | $ | 10.76 |  |  | $ | 18.29 |
Aggregate intrinsic value | $ | 88,000 |  |  | $ | 350,000 |

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=109197908&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=109197908&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=109197908&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=109197908&loc=d3e5070-113901 + Details
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