Note 5 - Loans Receivable (Details) - Purchased Credit Impaired Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Jun. 13, 2014
Financing Receivable, Impaired [Line Items]
PCI loans	$ 18,313	$ 21,105
Outstanding principal balance of PCI loans	21,492	26,942
One-to-Four-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
PCI loans	4,208	4,728
Nonfarm Nonresidential [Member]
Financing Receivable, Impaired [Line Items]
PCI loans	9,106	10,790
Farmland [Member]
Financing Receivable, Impaired [Line Items]
PCI loans	86	95
Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
PCI loans	3,300	3,432
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
PCI loans	1,502	1,882
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
PCI loans	$ 111	$ 178