Note 4 - Allowance for Loan Losses (Details) - Allowance for Loan Losses (USD $)	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Construction loans:
Allowance for loan losses, beginning balance		$ 3,790,000	$ 3,979,000	$ 3,979,000
Allowance for loan losses, charge-offs		(563,000)		(1,616,000)
Allowance for loan losses, recoveries		308,000		19,000
Allowance for loan losses, provision for loan losses	1,088,000	125,000	1,278,000	1,408,000
Allowance for loan losses, ending Balance		3,660,000		3,790,000
Allowance for loan losses, individually evaluated for impairment		126,000		208,000
Allowance for loan losses, collectively evaluated for impairment		3,534,000		3,582,000
Loans, ending balance		282,650,000		274,937,000
Loans, individually evaluated for impairment		12,604,000		15,630,000
Loans, collectively evaluated for impairment		270,046,000		259,307,000
Construction Residential [Member]
Construction loans:
Allowance for loan losses, beginning balance		117,000	90,000	90,000
Allowance for loan losses, charge-offs		0		0
Allowance for loan losses, recoveries		0		0
Allowance for loan losses, provision for loan losses		20,000		27,000
Allowance for loan losses, ending Balance		137,000		117,000
Allowance for loan losses, individually evaluated for impairment		0		0
Allowance for loan losses, collectively evaluated for impairment		137,000		117,000
Loans, ending balance		6,676,000		5,036,000
Loans, individually evaluated for impairment		0		0
Loans, collectively evaluated for impairment		6,676,000		5,036,000
Land Acquistion, Development and Commercial [Member]
Construction loans:
Allowance for loan losses, beginning balance		811,000	953,000	953,000
Allowance for loan losses, charge-offs		0		(519,000)
Allowance for loan losses, recoveries		0		0
Allowance for loan losses, provision for loan losses		(312,000)		377,000
Allowance for loan losses, ending Balance		499,000		811,000
Allowance for loan losses, individually evaluated for impairment		0		0
Allowance for loan losses, collectively evaluated for impairment		499,000		811,000
Loans, ending balance		18,148,000		20,198,000
Loans, individually evaluated for impairment		1,915,000		3,632,000
Loans, collectively evaluated for impairment		16,233,000		16,566,000
Real Estate Residential [Member]
Construction loans:
Allowance for loan losses, beginning balance		725,000	538,000	538,000
Allowance for loan losses, charge-offs		(446,000)		(151,000)
Allowance for loan losses, recoveries		55,000		0
Allowance for loan losses, provision for loan losses		555,000		338,000
Allowance for loan losses, ending Balance		889,000		725,000
Allowance for loan losses, individually evaluated for impairment		126,000		137,000
Allowance for loan losses, collectively evaluated for impairment		763,000		588,000
Loans, ending balance		67,422,000		69,691,000
Loans, individually evaluated for impairment		707,000		810,000
Loans, collectively evaluated for impairment		66,715,000		68,881,000
Real Estate Commercial [Member]
Construction loans:
Allowance for loan losses, beginning balance		1,054,000	1,314,000	1,314,000
Allowance for loan losses, charge-offs		(88,000)		(478,000)
Allowance for loan losses, recoveries		251,000		18,000
Allowance for loan losses, provision for loan losses		19,000		200,000
Allowance for loan losses, ending Balance		1,236,000		1,054,000
Allowance for loan losses, individually evaluated for impairment		0		71,000
Allowance for loan losses, collectively evaluated for impairment		1,236,000		983,000
Loans, ending balance		124,176,000		109,302,000
Loans, individually evaluated for impairment		9,377,000		10,157,000
Loans, collectively evaluated for impairment		114,799,000		99,145,000
Commercial, Industrial and Agricultural [Member]
Construction loans:
Allowance for loan losses, beginning balance		459,000	628,000	628,000
Allowance for loan losses, charge-offs		(27,000)		(71,000)
Allowance for loan losses, recoveries		0		0
Allowance for loan losses, provision for loan losses		(153,000)		(98,000)
Allowance for loan losses, ending Balance		279,000		459,000
Allowance for loan losses, individually evaluated for impairment		0		0
Allowance for loan losses, collectively evaluated for impairment		279,000		459,000
Loans, ending balance		37,218,000		42,382,000
Loans, individually evaluated for impairment		605,000		916,000
Loans, collectively evaluated for impairment		36,613,000		41,466,000
Equity Lines [Member]
Construction loans:
Allowance for loan losses, beginning balance		386,000	313,000	313,000
Allowance for loan losses, charge-offs		0		(393,000)
Allowance for loan losses, recoveries		2,000		0
Allowance for loan losses, provision for loan losses		(90,000)		466,000
Allowance for loan losses, ending Balance		298,000		386,000
Allowance for loan losses, individually evaluated for impairment		0		0
Allowance for loan losses, collectively evaluated for impairment		298,000		386,000
Loans, ending balance		19,668,000		20,504,000
Loans, individually evaluated for impairment		0		115,000
Loans, collectively evaluated for impairment		19,668,000		20,389,000
Consumer [Member]
Construction loans:
Allowance for loan losses, beginning balance		145,000	143,000	143,000
Allowance for loan losses, charge-offs		(2,000)		(4,000)
Allowance for loan losses, recoveries		0		1,000
Allowance for loan losses, provision for loan losses		(82,000)		5,000
Allowance for loan losses, ending Balance		61,000		145,000
Allowance for loan losses, individually evaluated for impairment		0		0
Allowance for loan losses, collectively evaluated for impairment		61,000		145,000
Loans, ending balance		9,342,000		7,824,000
Loans, individually evaluated for impairment		0		0
Loans, collectively evaluated for impairment		9,342,000		7,824,000
Unallocated [Member]
Construction loans:
Allowance for loan losses, beginning balance		93,000	0	0
Allowance for loan losses, charge-offs		0		0
Allowance for loan losses, recoveries		0		0
Allowance for loan losses, provision for loan losses		168,000		93,000
Allowance for loan losses, ending Balance		261,000		93,000
Allowance for loan losses, individually evaluated for impairment		0		0
Allowance for loan losses, collectively evaluated for impairment		261,000		93,000
Loans, ending balance		0		0
Loans, individually evaluated for impairment		0		0
Loans, collectively evaluated for impairment		$ 0		$ 0