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Segment Information - Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Segment Reporting Information [Line Items]
Revenues from external customers	$ 31,089	$ 30,534
Earnings (loss) before income taxes	1,534	1,845
Corporate [Member]
Segment Reporting Information [Line Items]
Intersegment revenues	(807)	(656)
Earnings (loss) before income taxes	(1,064)	(1,062)
Americas Operations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	24,315	24,248
Intersegment revenues	286	124
Earnings (loss) before income taxes	1,833	2,203
International [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	6,774	6,286
Intersegment revenues	521	532
Earnings (loss) before income taxes	$ 765	$ 704

X

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 940



-SubTopic 20



-Section 25



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-Topic 235



-SubTopic 10



-Section S99



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Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 10



-Article 5

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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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



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-Topic 225



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-Section S99



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