Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Investment securities available for sale, due in one year or less, amortized cost	$ 3,083
Investment securities available for sale, due in one year or less, fair value	3,122
Investment securities available for sale, due after one year through five years, amortized cost	74,142
Investment securities available for sale, due after one year through five years, fair value	73,962
Investment securities available for sale, due after five years through ten years, amortized cost	119,950
Investment securities available for sale, due after five years through ten years, fair value	117,826
Investment securities available for sale, due after ten years, amortized cost	19,761
Investment securities available for sale, due after ten years, fair value	19,672
Investment securities available for sale, amortized cost	216,936
Investment securities available for sale, fair value	214,582	214,383
US Government Agencies Debt Securities [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Investment securities available for sale, due after five years through ten years, amortized cost	1,923
Investment securities available for sale, due after five years through ten years, fair value	1,925
Investment securities available for sale, amortized cost	1,923
Investment securities available for sale, fair value	1,925
State and Municipal [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Investment securities available for sale, due in one year or less, amortized cost	2,545
Investment securities available for sale, due in one year or less, fair value	2,582
Investment securities available for sale, due after one year through five years, amortized cost	2,060
Investment securities available for sale, due after one year through five years, fair value	2,125
Investment securities available for sale, due after five years through ten years, amortized cost	1,075
Investment securities available for sale, due after five years through ten years, fair value	1,056
Investment securities available for sale, amortized cost	5,680
Investment securities available for sale, fair value	5,763	7,460
Collateralized Mortgage Obligations (Federal Agencies) [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Investment securities available for sale, due in one year or less, amortized cost	538
Investment securities available for sale, due in one year or less, fair value	540
Investment securities available for sale, due after one year through five years, amortized cost	12,604
Investment securities available for sale, due after one year through five years, fair value	12,330
Investment securities available for sale, due after five years through ten years, amortized cost	80,075
Investment securities available for sale, due after five years through ten years, fair value	77,940
Investment securities available for sale, amortized cost	93,217
Investment securities available for sale, fair value	90,810	93,132
Other Mortgage-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Investment securities available for sale, due after one year through five years, amortized cost	40,872
Investment securities available for sale, due after one year through five years, fair value	40,933
Investment securities available for sale, due after five years through ten years, amortized cost	21,257
Investment securities available for sale, due after five years through ten years, fair value	21,129
Investment securities available for sale, due after ten years, amortized cost	17,727
Investment securities available for sale, due after ten years, fair value	17,672
Investment securities available for sale, amortized cost	79,856
Investment securities available for sale, fair value	79,734	76,020
SBA Loan-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Investment securities available for sale, due after one year through five years, amortized cost	18,606
Investment securities available for sale, due after one year through five years, fair value	18,574
Investment securities available for sale, due after five years through ten years, amortized cost	15,620
Investment securities available for sale, due after five years through ten years, fair value	15,776
Investment securities available for sale, due after ten years, amortized cost	2,034
Investment securities available for sale, due after ten years, fair value	2,000
Investment securities available for sale, amortized cost	36,260
Investment securities available for sale, fair value	$ 36,350	$ 37,771