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Note 1 - General (Detail) - Business Acquisitions - Continued Purchase Price Allocation (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 30, 2012
Change in goodwill related to acquisitions	$ 200
Payables [Member] \| Fyfe Asia [Member]
Change in goodwill related to acquisitions	206
Fyfe Asia [Member]
Total identifiable net assets	20,342	20,136
Goodwill	19,802	20,008
Change in goodwill related to acquisitions	206
Total identifiable net assets	20,136	20,136
Goodwill	$ 20,008	$ 20,008

The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

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