Note 1 - General (Detail) - Business Acquisitions - Initial Purchase Price Allocation (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Jun. 30, 2011 CRTS [Member]	Mar. 31, 2012 Hockway [Member]	Dec. 31, 2011 Hockway [Member]	Aug. 31, 2011 Hockway [Member]	Mar. 31, 2012 Fyfe NA [Member]	Dec. 31, 2011 Fyfe NA [Member]	Aug. 31, 2011 Fyfe NA [Member]	Jan. 04, 2012 Fyfe LA [Member]
Cash		$ 361			$ 536			$ 1,096	$ 301
Receivables and cost and estimated earnings in excess of billings		2,365			2,341			16,019	576
Inventories		21			623			5,977	514
Prepaid expenses and other current assets		175			228			792	75
Property, plant and equipment		5,350			324			1,064	90
Identified intangible assets		26,220			2,200			53,768	1,402
Accounts payable, accrued expenses and billings in excess of cost and estimated earnings		(2,830)			(1,767)			(3,642)	(505)
Deferred tax liabilities		(11,395)
Total identifiable net assets		20,267	4,485	4,078	4,485	75,074	75,074	75,074	2,453
Total consideration recorded	166,053	38,760			5,006			118,118	4,169
Less: total identifiable net assets		20,267	4,485	4,078	4,485	75,074	75,074	75,074	2,453
Goodwill at March 31, 2012		$ 18,493	$ 521	$ 1,982	$ 521	$ 43,044	$ 43,239	$ 43,044	$ 1,716