Note 3 - Securities (Detail) - Securities Available to sell With Unrealized Losses (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Less Than 12 Months - Fair Value	$ 13,034
Less Than 12 Months - Unrealized Loss	(55)
Total - Fair Value	13,034
Total - Unrealized Loss	(55)
US Government-sponsored Enterprises Debt Securities [Member]
Less Than 12 Months - Fair Value	7,997
Less Than 12 Months - Unrealized Loss	(28)
Total - Fair Value	7,997
Total - Unrealized Loss	(28)
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Less Than 12 Months - Fair Value	5,037
Less Than 12 Months - Unrealized Loss	(27)
Total - Fair Value	5,037
Total - Unrealized Loss	$ (27)