Note 3 - Securities (Detail) - Securities Held to Maturity with Unrealized Losses (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Less Than 12 Months - Fair Value	$ 2,319	$ 2,018
Less Than 12 Months- Unrecognized Loss	(70)	(63)
12 Months or More - Fair Value	258	260
12 Months or More - Unrecognized Loss	(4)	(2)
Total - Fair Value	2,577	2,278
Total - Unrecognized Loss	(74)	(65)
US States and Political Subdivisions Debt Securities [Member]
Less Than 12 Months - Fair Value	2,319	2,018
Less Than 12 Months- Unrecognized Loss	(70)	(63)
12 Months or More - Fair Value	258	260
12 Months or More - Unrecognized Loss	(4)	(2)
Total - Fair Value	2,577	2,278
Total - Unrecognized Loss	$ (74)	$ (65)