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Segment Information (Consolidated Revenues From Continuing Operations By Country) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Aug. 31, 2012 | Aug. 31, 2011 | Aug. 31, 2010
Segment Reporting Information [Line Items] |  |  |
Sales | $ 170,456 | $ 160,804 | $ 136,874
United States [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 121,328 | 115,709 | 97,286
Japan [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 19,440 | 17,263 | 13,935
Canada [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 8,574 | 7,080 | 6,157
United Kingdom [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 5,341 | 5,143 | 5,751
Australia [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 3,992 | 5,058 | 4,545
China/Singapore [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 2,512 | 2,185 | 1,900
Mexico/Central America [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 913 | 837 | 590
Indonesia [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 705 | 610 | 461
Thailand [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 693 | 729 | 505
Denmark/Scandinavia [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 660 | 725 | 568
Korea [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 607 | 861 | 1,028
India [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 576 | 515 | 422
Brazil [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 509 | 567 | 460
Malaysia [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 458 | 429 | 362
Others [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | $ 4,148 | $ 3,093 | $ 2,904

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales 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) -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_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration