Note 6 - Allowance for Loan and Lease Losses (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Real Estate Portfolio Segment [Member] | One-to-Four-Family Residential [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			$ 381,000
Balance, end of period	$ 288,000		288,000
Real Estate Portfolio Segment [Member] | One-to-Four-Family Residential [Member]
Balance, begining of period	3,795,000	$ 4,219,000	3,870,000	$ 4,488,000
Provision (reversals)	160,000	64,000	169,000	(146,000)
Charge-offs	(79,000)	(134,000)	(169,000)	(213,000)
Recoveries	16,000	16,000	22,000	36,000
Balance, end of period	3,892,000	4,165,000	3,892,000	4,165,000
Provision (reversals)	160,000	64,000	169,000	(146,000)
Real Estate Portfolio Segment [Member] | Multifamily Residential [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			0
Balance, end of period	0		0
Real Estate Portfolio Segment [Member] | Multifamily Residential [Member]
Balance, begining of period	787,000	633,000	665,000	791,000
Provision (reversals)	(8,000)	(52,000)	115,000	(210,000)
Charge-offs	0	0	(1,000)	0
Recoveries	0	0	0	0
Balance, end of period	779,000	581,000	779,000	581,000
Provision (reversals)	(8,000)	(52,000)	115,000	(210,000)
Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			552,000
Balance, end of period	425,000		425,000
Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member]
Balance, begining of period	3,306,000	3,970,000	3,599,000	4,243,000
Provision (reversals)	(160,000)	(90,000)	(444,000)	(396,000)
Charge-offs	0	0	(9,000)	0
Recoveries	0	0	0	33,000
Balance, end of period	3,146,000	3,880,000	3,146,000	3,880,000
Provision (reversals)	(160,000)	(90,000)	(444,000)	(396,000)
Real Estate Portfolio Segment [Member] | Farmland [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			0
Balance, end of period	0		0
Real Estate Portfolio Segment [Member] | Farmland [Member]
Balance, begining of period	665,000	487,000	714,000	342,000
Provision (reversals)	51,000	31,000	2,000	176,000
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	716,000	518,000	716,000	518,000
Provision (reversals)	51,000	31,000	2,000	176,000
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			21,000
Balance, end of period	21,000		21,000
Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Balance, begining of period	1,571,000	1,070,000	1,456,000	1,023,000
Provision (reversals)	(3,000)	59,000	54,000	5,000
Charge-offs	0	(10,000)	0	(10,000)
Recoveries	1,000	2,000	59,000	103,000
Balance, end of period	1,569,000	1,121,000	1,569,000	1,121,000
Provision (reversals)	(3,000)	59,000	54,000	5,000
Commercial Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			561,000
Balance, end of period	138,000		138,000
Commercial Portfolio Segment [Member]
Balance, begining of period	3,145,000	1,659,000	2,565,000	2,315,000
Provision (reversals)	467,000	109,000	1,111,000	(550,000)
Charge-offs	(11,000)	0	(78,000)	0
Recoveries	2,000	(3,000)	5,000	0
Balance, end of period	3,603,000	1,765,000	3,603,000	1,765,000
Provision (reversals)	467,000	109,000	1,111,000	(550,000)
Consumer Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period			0
Balance, end of period	0		0
Consumer Portfolio Segment [Member]
Balance, begining of period	176,000	107,000	166,000	101,000
Provision (reversals)	62,000	69,000	133,000	98,000
Charge-offs	(86,000)	(80,000)	(169,000)	(134,000)
Recoveries	22,000	25,000	44,000	56,000
Balance, end of period	174,000	121,000	174,000	121,000
Provision (reversals)	62,000	69,000	133,000	98,000
Receivables Acquired with Deteriorated Credit Quality [Member]
Balance, begining of period	1,421,000	1,617,000	1,515,000	357,000
Provision (reversals)	(36,000)	110,000	(118,000)	1,623,000
Charge-offs	(539,000)	(24,000)	(576,000)	(277,000)
Recoveries	26,000	0	51,000	0
Balance, end of period	872,000	1,703,000	872,000	1,703,000
Provision (reversals)	(36,000)	110,000	(118,000)	1,623,000
Balance, begining of period	14,866,000	13,762,000	14,550,000	13,660,000
Provision (reversals)	533,000	300,000	1,022,000	600,000
Charge-offs	(715,000)	(248,000)	(1,002,000)	(634,000)
Recoveries	67,000	40,000	181,000	228,000
Balance, end of period	14,751,000	13,854,000	14,751,000	13,854,000
Provision (reversals)	$ 533,000	$ 300,000	$ 1,022,000	$ 600,000