Pro Forma Information of Company as of Business Combination (Detail) (Ultrasonix, USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Oct. 31, 2013	Oct. 31, 2012
Ultrasonix
Business Acquisition [Line Items]
Net revenue	$ 110.1	$ 128.1
Net (loss) income	$ (4.4)	$ 3.8
Net (loss) income per share, basic	$ (0.36)	$ 0.31
Net (loss) income per share, diluted	$ (0.36)	$ 0.30

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

+ Details

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

+ Details

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

+ Details

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