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Note 12 - Segment and Related Information (Detail)	12 Months Ended
Note 12 - Segment and Related Information (Detail)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Number of Reportable Segments	3
Concentration Risk, Customer	No	No	No
Percentage of Threshold Limit of Sales Revenue	10.00%	10.00%	10.00%

Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).

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