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Note 16 - Oil And Gas Disclosures (Unaudited) (Detail) - Changes in Standardized Measure of Discounted Future Net Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Total  
Standardized measure -- beginning of year $ 0
Increase (decrease)  
Sales, net of production costs (345)
Net change in prices, net of production costs 37
Development costs incurred 0
Change in future development costs 0
Change in future income taxes 0
Revisions of quantity estimates 0
Accretion of discount 106
Changes in production rates, timing and other 0
Extensions and discoveries, net of future costs 0
Sales of reserves-in-place 0
Purchases of reserves-in-place 1,037
Standardized measure -- end of year $ 835