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Note N - Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Apr. 30, 2018
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | Year Ended April 30, 2018
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Total
Revenues |  | $ | 146,418 |  |  | $ | 149,118 |  |  | $ | 147,214 |  |  | $ | 169,451 |  |  | $ | 612,201 |
Gross profit |  |  | 53,068 |  |  |  | 54,804 |  |  |  | 53,215 |  |  |  | 61,168 |  |  |  | 222,255 |
Net income |  |  | 6,992 |  |  |  | 5,969 |  |  |  | 13,379 |  |  |  | 10,169 |  |  |  | 36,509 |
Net income attributable to common stockholders |  |  | 6,982 |  |  |  | 5,959 |  |  |  | 13,369 |  |  |  | 10,159 |  |  |  | 36,469 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.92 |  |  |  | 0.82 |  |  |  | 1.88 |  |  |  | 1.47 |  |  |  | 5.04 |
Diluted |  |  | 0.90 |  |  |  | 0.79 |  |  |  | 1.82 |  |  |  | 1.43 |  |  |  | 4.90 |
|  | Year Ended April 30, 2017
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Total
Revenues |  | $ | 145,840 |  |  | $ | 150,210 |  |  | $ | 138,784 |  |  | $ | 152,917 |  |  | $ | 587,751 |
Gross profit |  |  | 54,171 |  |  |  | 55,173 |  |  |  | 49,427 |  |  |  | 56,451 |  |  |  | 215,222 |
Net income |  |  | 7,109 |  |  |  | 5,018 |  |  |  | 2,836 |  |  |  | 5,242 |  |  |  | 20,205 |
Net income attributable to common stockholders |  |  | 7,099 |  |  |  | 5,008 |  |  |  | 2,826 |  |  |  | 5,232 |  |  |  | 20,165 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.89 |  |  |  | 0.64 |  |  |  | 0.36 |  |  |  | 0.68 |  |  |  | 2.57 |
Diluted |  |  | 0.87 |  |  |  | 0.62 |  |  |  | 0.35 |  |  |  | 0.66 |  |  |  | 2.49 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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