Note 9 - Federal Home Loan Bank Borrowings (Detail) - Federal Home Loan Bank of Atlanta Borrowings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance	$ 22,862	$ 19,760
Atlanta [Member] | September 7, 2017 [Member]
Maturity Date	Sep. 07, 2017
Conversion Date	Mar. 07, 2011
Current Rate	3.69%
Balance	4,000	4,000
Atlanta [Member] | October 19, 2012 [Member]
Maturity Date	Oct. 19, 2012
Current Rate	1.97%
Balance		12,000
Atlanta [Member] | July 28, 2014 [Member]
Maturity Date	Jul. 28, 2014
Current Rate	2.19%
Balance	3,000	3,000
Atlanta [Member] | April 13, 2016 [Member]
Maturity Date	Apr. 13, 2016
Current Rate	1.265%
Balance	12,000
Atlanta [Member] | November 7, 2013 [Member]
Maturity Date	Nov. 07, 2013
Current Rate	0.355%
Balance	3,000
Atlanta [Member]
Balance	$ 22,000	$ 19,000