Note 1 - General (Details) - Business Acquisitions - Initial Purchase Price Allocation (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Apr. 30, 2012	Jun. 30, 2013		Dec. 31, 2012	Mar. 31, 2013 Fyfe Asia [Member]	Dec. 31, 2012 Fyfe Asia [Member]
Note 1 - General (Details) - Business Acquisitions - Initial Purchase Price Allocation [Line Items]
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				20,136	20,342
Total consideration recorded	40,144
Less: total identifiable net assets	20,136				20,136	20,342
Goodwill at March 31, 2013	$ 20,008	$ 270,525	[1]	$ 272,294	$ 20,008	$ 19,802

[1] The Company does not have any accumulated impairment charges.