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Note B - Summary of Significant Accounting Policies (Detail) - Sales (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2012 | Oct. 31, 2011
Sales | $ 98,194 | $ 100,128 | $ 196,491 | $ 190,452
Sales - Used Autos [Member] |  |  |  |
Sales | 86,688 | 88,702 | 173,573 | 168,276
Wholesales - Third Party [Member] |  |  |  |
Sales | 4,818 | 5,337 | 9,653 | 10,231
Service Contract Sales [Member] |  |  |  |
Sales | 3,546 | 3,347 | 7,069 | 6,539
Payment Protection Plan Revenue [Member] |  |  |  |
Sales | $ 3,142 | $ 2,742 | $ 6,196 | $ 5,406

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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=6880815&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
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration