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Note 6 - Segment Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Number of Reportable Segments	1
Property, Plant and Equipment, Additions	$ 11.0
Property, Plant and Equipment, Gross, Period Increase (Decrease)	6.2
Building [Member]
Property, Plant and Equipment, Gross	5.0
Land [Member]
Property, Plant and Equipment, Gross	$ 6.0
Maximum [Member]
Concentration Risk, Percentage	10.00%
Minimum [Member]
Concentration Risk, Percentage	10.00%

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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