Note 1 - General (Detail) - Business Acquisitions - Initial Purchase Price Allocation (Fyfe Asia [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Apr. 30, 2012
Fyfe Asia [Member]
Cash			$ 1,303
Receivables and cost and estimated earnings in excess of billings			9,022
Prepaid expenses and other current assets			1,262
Property, plant and equipment			938
Identified intangible assets			14,130
Accounts payable, accrued expenses and billings in excess of cost and estimated earnings			(4,109)
Deferred tax liabilities			(2,410)
Total identifiable net assets	20,136	20,342	20,136
Total consideration recorded			40,144
Less: total identifiable net assets	20,136	20,342	20,136
Goodwill at March 31, 2013	$ 20,008	$ 19,802	$ 20,008