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Note B - Significant Accounting Policies (Details) - Sales (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Jul. 31, 2013 | Jul. 31, 2012
Revenue from External Customer [Line Items] |  |
Sales | $ 109,149 | $ 98,297
Sales - Used Autos [Member] |  |
Revenue from External Customer [Line Items] |  |
Sales | 97,306 | 86,884
Wholesales - Third Party [Member] |  |
Revenue from External Customer [Line Items] |  |
Sales | 4,463 | 4,835
Service Contract Sales [Member] |  |
Revenue from External Customer [Line Items] |  |
Sales | 3,914 | 3,524
Payment Protection Plan Revenue [Member] |  |
Revenue from External Customer [Line Items] |  |
Sales | $ 3,466 | $ 3,054

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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