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Note 2 - Securities Available-for-Sale (Detail) - Gross realized gains and gross realized losses on sales of securities available-for-sale (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Net Gains (Losses)   $ 10,688
Equity Securities [Member]
   
Realized Gains      
Realized Losses      
Net Gains (Losses)      
Mutual Funds [Member]
   
Realized Gains    10,831
Realized Losses    143
Net Gains (Losses)    $ 10,688