Note 7 - Interest-Bearing Deposits (Detail) - Interest Expense on Deposits (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Savings	$ 4	$ 8	$ 11
NOW	258	372	472
Money Market	2,324	2,475	2,805
Time Deposits	4,151	5,583	6,300
Three Months or Less [Member] | Domestic Deposits [Member]
Time Deposits	1,387	2,185	2,665
Three Months or Less [Member] | Foreign Deposits [Member]
Time Deposits			3
More Than Three Months Through Twelve Months [Member] | Domestic Deposits [Member]
Time Deposits	2,252	1,776	3,086
More Than Twelve Months Through Twenty-Four Months [Member] | Domestic Deposits [Member]
Time Deposits	357	1,215	270
More Than Twenty-Four Months Through Thirty-Six Months [Member] | Domestic Deposits [Member]
Time Deposits	141	235	212
More Than Thirty-Six Months Through Forty-Eight Months [Member] | Domestic Deposits [Member]
Time Deposits	6	142	23
More Than Forty-Eight Months Through Sixty Months [Member] | Domestic Deposits [Member]
Time Deposits	7	29	41
More Than Sixty Months [Member] | Domestic Deposits [Member]
Time Deposits	1	1
Domestic Deposits [Member]
Time Deposits	6,737	8,438	9,585
Foreign Deposits [Member]
Time Deposits	$ 6,737	$ 8,438	$ 9,588