Note 8 - Disclosures about Fair Value of Assets and Liabilities (Detail) - Unobservable Inputs (USD $)			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Collateral Dependent [Member] Minimum [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Collateral Dependent [Member] Maximum [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Collateral Dependent [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Foreclosed Assets Held for Sale [Member] Minimum [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Foreclosed Assets Held for Sale [Member] Maximum [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Foreclosed Assets Held for Sale [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Fair Value, Inputs, Level 3 [Member]
Fair Value (in Dollars)	$ 17,554,000	$ 17,277,000			$ 7,367,000				$ 1,521,000
Valuation Technique					Market Comparable			Market Comparable	Discounted cash flow
Unobservable Input					Discount to reflect realizable value			Discount to reflect realizable value	Discount rate
Range (Weighted Average)			0.00%	100.00%	(8.00%)	0.00%	68.00%	(31.00%)	0.00%
Foreclosed assets held for sale (in Dollars)	$ 3,913,629	$ 4,529,727						$ 23,000
Foreclosed assets held for sale					Market Comparable			Market Comparable	Discounted cash flow
Foreclosed assets held for sale					Discount to reflect realizable value			Discount to reflect realizable value	Discount rate
Foreclosed assets held for sale			0.00%	100.00%	(8.00%)	0.00%	68.00%	(31.00%)	0.00%