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Note H - Weighted Average Shares Outstanding (Tables) | 6 Months Ended
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Oct. 31, 2012
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Weighted average shares outstanding-basic |  |  | 9,105,921 |  |  |  | 9,776,817 |  |  |  | 9,205,332 |  |  |  | 10,024,088 |
Dilutive options and restricted stock |  |  | 473,488 |  |  |  | 304,457 |  |  |  | 460,407 |  |  |  | 306,461 |
Weighted average shares outstanding-diluted |  |  | 9,579,409 |  |  |  | 10,081,274 |  |  |  | 9,665,739 |  |  |  | 10,330,549 |
Antidilutive securities not included: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options |  |  | 45,000 |  |  |  | 25,000 |  |  |  | 40,000 |  |  |  | 25,000 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration