Preliminary Allocation of Total Purchase Price (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Apr. 30, 2013	Aug. 14, 2013 Taylor Manufacturing Systems, USA, LLC
Business Acquisition [Line Items]
Current Assets			$ 130
Goodwill	13,819	12,601	1,218
Current Technology			472
Total Assets Acquired			1,820
Current Liabilities			(213)
Long Term liabilities			(366)
Net Assets Acquired			$ 1,241

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Amount of assets acquired at the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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