Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Real Estate Construction Portfolio Segment[Member]
Balance			$ 576,000	$ 612,000	$ 612,000
Charge-offs			(29,000)	0	0
Recoveries			0	0	0
Provision for loan losses			(32,000)	(136,000)	(36,000)
Balance	$ 515,000	$ 476,000	515,000	476,000	576,000
Consumer Real Estate Portfolio Segment [Member]
Balance			1,866,000	1,662,000	1,662,000
Charge-offs			(89,000)	(201,000)	(205,000)
Recoveries			1,000	1,000	2,000
Provision for loan losses			(2,000)	375,000	407,000
Balance	1,776,000	1,837,000	1,776,000	1,837,000	1,866,000
Commercial Real Estate Portfolio Segment [Member]
Balance			4,109,000	3,537,000	3,537,000
Charge-offs			(125,000)	(116,000)	(1,114,000)
Recoveries			59,000	24,000	49,000
Provision for loan losses			(574,000)	373,000	1,637,000
Balance	3,469,000	3,818,000	3,469,000	3,818,000	4,109,000
Commercial Non Real Estate Segment [Member]
Balance			655,000	1,475,000	1,475,000
Charge-offs			(708,000)	(330,000)	(490,000)
Recoveries			1,000	0	1,000
Provision for loan losses			1,537,000	(204,000)	(331,000)
Balance	1,485,000	941,000	1,485,000	941,000	655,000
Public Sector and IDA Portfolio Segment[Member]
Balance			436,000	327,000	327,000
Charge-offs			0	0	0
Recoveries			0	0	0
Provision for loan losses			(55,000)	159,000	109,000
Balance	381,000	486,000	381,000	486,000	436,000
Consumer Non Real Estate Portfolio Segment [Member]
Balance			627,000	602,000	602,000
Charge-offs			(100,000)	(129,000)	(311,000)
Recoveries			31,000	63,000	93,000
Provision for loan losses			(3,000)	(22,000)	243,000
Balance	555,000	514,000	555,000	514,000	627,000
Unallocated Financing Receivables [Member]
Balance			28,000	48,000	48,000
Charge-offs			0	0	0
Recoveries			0	0	0
Provision for loan losses			(14,000)	11,000	(20,000)
Balance	14,000	59,000	14,000	59,000	28,000
Balance			8,297,000	8,263,000	8,263,000
Charge-offs			(1,051,000)	(776,000)	(2,120,000)
Recoveries			92,000	88,000	145,000
Provision for loan losses	654,000	355,000	857,000	556,000	2,009,000
Balance	$ 8,195,000	$ 8,131,000	$ 8,195,000	$ 8,131,000	$ 8,297,000