Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Allowance for Loan Losses (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 1,258,000		$ 1,258,000			$ 1,807,000
Collectively evaluated for impairment	5,871,000		5,871,000			5,239,000
Balance	7,129,000	7,749,000	7,129,000	7,749,000	7,015,000	7,046,000	7,731,000	7,779,000
Charge-offs	(233,000)	(426,000)	(584,000)	(896,000)
Recoveries	227,000	144,000	367,000	253,000
Provision	120,000	300,000	300,000	613,000
Commercial and Industrial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	87,000		87,000			179,000
Collectively evaluated for impairment	509,000		509,000			435,000
Balance	596,000	875,000	596,000	875,000	867,000	614,000	1,229,000	1,732,000
Charge-offs	(80,000)		(92,000)	(325,000)
Recoveries	64,000	92,000	65,000	92,000
Provision	(255,000)	(446,000)	9,000	(624,000)
Real Estate Construction [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	141,000		141,000			210,000
Collectively evaluated for impairment	282,000		282,000			366,000
Balance	423,000	1,192,000	423,000	1,192,000	488,000	576,000	1,047,000	1,123,000
Charge-offs		(128,000)		(190,000)
Recoveries	60,000		60,000	33,000
Provision	(125,000)	273,000	(213,000)	226,000
Residential Real Estate Mortgage [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	858,000		858,000			855,000
Collectively evaluated for impairment	3,272,000		3,272,000			2,809,000
Balance	4,130,000	3,626,000	4,130,000	3,626,000	3,726,000	3,664,000	3,207,000	2,872,000
Charge-offs	(141,000)	(279,000)	(457,000)	(345,000)
Recoveries	58,000	47,000	195,000	71,000
Provision	487,000	651,000	728,000	1,028,000
Commercial Real Estate Mortgage [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	169,000		169,000			563,000
Collectively evaluated for impairment	1,756,000		1,756,000			1,607,000
Balance	1,925,000	2,005,000	1,925,000	2,005,000	1,862,000	2,170,000	2,201,000	1,991,000
Recoveries	40,000		40,000	46,000
Provision	23,000	(196,000)	(285,000)	(32,000)
Consumer Installment [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	3,000		3,000
Collectively evaluated for impairment	52,000		52,000			22,000
Balance	55,000	51,000	55,000	51,000	72,000	22,000	47,000	61,000
Charge-offs	(12,000)	(19,000)	(35,000)	(36,000)
Recoveries	5,000	5,000	7,000	11,000
Provision	$ (10,000)	$ 18,000	$ 61,000	$ 15,000