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Note 6 - Income Taxes (Detail) - Income tax reconciliation (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Tax at statutory rates $ 900,944 $ 468,082
Tax effect of the following:    
Statutory depletion (130,489) (78,438)
Dividend exclusion   (3,171)
State income tax 71,525 32,844
Other 40 (593)
Income tax 842,020 418,724
Extraordinary Item [Member]
   
Tax at statutory rates 233,762  
Tax effect of the following:    
State income tax 22,085  
Other 153  
Income tax $ 256,000