Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Impaired Loans and Associated Reserves (Details) - USD ($)		Sep. 30, 2016		Dec. 31, 2015		Sep. 30, 2015
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Principal Balance	[1]	$ 280,000		$ 718,000
Total Recorded Investment	[1],[2]	273,000		718,000
Impaired loans with no valuation allowance	[1],[2]	273,000		718,000
Impaired loans with a valuation allowance	[1],[2]	0		0
Related Allowance	[1]	0		0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Principal Balance	[1]	653,000		713,000
Total Recorded Investment	[1],[2]	615,000		669,000
Impaired loans with no valuation allowance	[1],[2]	269,000		305,000
Impaired loans with a valuation allowance	[1],[2]	346,000		364,000
Related Allowance	[1]	15,000		13,000
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Principal Balance	[1]	201,000		218,000
Total Recorded Investment	[1],[2]	201,000		218,000
Impaired loans with no valuation allowance	[1],[2]	0		0
Impaired loans with a valuation allowance	[1],[2]	201,000		218,000
Related Allowance	[1]	8,000		5,000
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Principal Balance	[1]	73,000		75,000
Total Recorded Investment	[1],[2]	73,000		75,000
Impaired loans with no valuation allowance	[1],[2]	0		0
Impaired loans with a valuation allowance	[1],[2]	73,000		75,000
Related Allowance	[1]	4,000		4,000
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Principal Balance	[1]	1,732,000		1,988,000
Total Recorded Investment	[1],[2]	1,459,000		1,728,000
Impaired loans with no valuation allowance	[1],[2]	1,459,000		1,728,000
Impaired loans with a valuation allowance	[1],[2]	0		0
Related Allowance	[1]	0		0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Principal Balance	[1]	4,277,000		5,068,000
Total Recorded Investment	[1],[2]	4,228,000		5,020,000
Impaired loans with no valuation allowance	[1],[2]	4,228,000		3,304,000
Impaired loans with a valuation allowance	[1],[2]	0		1,716,000
Related Allowance	[1]	0		23,000
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Principal Balance	[1]	3,012,000		5,990,000
Total Recorded Investment	[1],[2]	2,761,000		5,827,000
Impaired loans with no valuation allowance	[1],[2]	2,761,000		5,827,000
Impaired loans with a valuation allowance	[1],[2]	0		0
Related Allowance	[1]	0		0
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Principal Balance	[1]	311,000		1,099,000
Total Recorded Investment	[1],[2]	297,000		1,091,000
Impaired loans with no valuation allowance	[1],[2]	297,000		1,091,000
Impaired loans with a valuation allowance	[1],[2]	0		0
Related Allowance	[1]	0		0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Principal Balance		3,000
Total Recorded Investment	[2]	3,000
Impaired loans with no valuation allowance	[2]	3,000
Impaired loans with a valuation allowance	[2]	0
Related Allowance		0
Principal Balance		10,542,000		15,869,000
Total Recorded Investment		9,910,000	[2]	15,346,000	[2]	$ 15,012,000
Impaired loans with no valuation allowance		9,290,000	[2]	12,973,000	[2]	12,548,000
Impaired loans with a valuation allowance		620,000	[2]	2,373,000	[2]	2,464,000
Related Allowance		$ 27,000		$ 45,000		$ 144,000

[1] Only classes with impaired loans are shown.

[2] Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.