Note 16 - Oil And Gas Disclosures (Unaudited) (Detail) (USD $)	12 Months Ended
Dec. 31, 2012
Additional Information Necessary to Prevent Disclosure of Discounts Future Net Cash Flows from Being Misleading	"Standardized measure" relates to the estimated discounted future net cash flows, as adjusted for our asset retirement obligations, and major components of that calculation relating to proved reserves at the end of the year in the aggregate and by geographic area, based on average prices, costs, and statutory tax rates and using a 10% annual discount rate. Prices at December 31, 2012 were based on a simple average of the first day of the month price for the period of January 1, 2012 to December 1, 2012 of $95.05 per barrel and $2.75 per mmbtu, as adjusted bybasin for quality, transportation and regional price differentials
BBL [Member]
Arithmetic Average Price	95.05
MMBTU [Member]
Arithmetic Average Price	2.75

Additional Information Necessary to Prevent Disclosure of Discounts Future Net Cash Flows from Being Misleading

"Standardized measure" relates to the estimated discounted future net cash flows, as adjusted for our asset retirement obligations, and major components of that calculation relating to proved reserves at the end of the year in the aggregate and by geographic area, based on average prices, costs, and statutory tax rates and using a 10% annual discount rate. Prices at December 31, 2012 were based on a simple average of the first day of the month price for the period of January 1, 2012 to December 1, 2012 of $95.05 per barrel and $2.75 per mmbtu, as adjusted bybasin for quality, transportation and regional price differentials

95.05

Arithmetic Average Price

2.75