Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	$ 144	$ 282
Allowance for loan losses, collectively evaluated for impairment	7,973	7,981
Allowance for loan losses	8,117	8,263	$ 8,031	$ 8,227
Loans individually evaluated for impairment	15,012	15,121
Loans collectively evaluated for impairment	611,597	591,198
Total loans	626,609	606,319
Real Estate Construction Portfolio Segment[Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	535	612
Allowance for loan losses	535	612	584	863
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	44,886	45,562
Total loans	44,886	45,562
Consumer Real Estate Portfolio Segment [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	25	14
Allowance for loan losses, collectively evaluated for impairment	1,769	1,648
Allowance for loan losses	1,794	1,662	1,678	1,697
Loans individually evaluated for impairment	973	819
Loans collectively evaluated for impairment	144,017	146,220
Total loans	144,990	147,039
Commercial Real Estate Portfolio Segment [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	119	258
Allowance for loan losses, collectively evaluated for impairment	3,719	3,279
Allowance for loan losses	3,838	3,537	3,675	3,685
Loans individually evaluated for impairment	13,042	13,624
Loans collectively evaluated for impairment	301,966	297,138
Total loans	315,008	310,762
Commercial Portfolio Segment [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	10
Allowance for loan losses, collectively evaluated for impairment	870	1,465
Allowance for loan losses	870	1,475	1,064	989
Loans individually evaluated for impairment	997	678
Loans collectively evaluated for impairment	38,258	32,735
Total loans	39,255	33,413
Public Sector and IDA Portfolio Segment[Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	497	327
Allowance for loan losses	497	327	280	132
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	52,330	41,361
Total loans	52,330	41,361
Consumer Portfolio Segment [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	514	602
Allowance for loan losses	514	602	609	576
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	30,140	28,182
Total loans	30,140	28,182
Unallocated Financing Receivables [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	69	48
Allowance for loan losses	69	48	$ 141	$ 285
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	0	0
Total loans	$ 0	$ 0

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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