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Note 2 - Securities (Detail) (USD $)	3 Months Ended	12 Months Ended
Note 2 - Securities (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012 Credit Loss [Member]
Available-for-sale Securities, Gross Realized Gain (Loss)	$ (306,000)
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	509,000
Less OTTI Charges Recognized In Net Income Mortgage Backed Securities		10,000
Less OTTI Charges Recognized In Net Income Asset Backed Securities		$ 6,000

The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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