Note 6 - Loans Receivable and Allowances for Loan Losses - Gross Loans by Major Categories (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	$ 376,466,000	$ 349,726,000
Construction and Land Development Portfolio Segment [Member]
Loans receivable	48,983,000	46,547,000
Commercial Portfolio Segment [Member]
Loans receivable	186,126,000	181,850,000
Owner Occupied Real Estate [Member]
Loans receivable	268,435,000	246,398,000
Consumer Portfolio Segment [Member]
Loans receivable	58,580,000	48,126,000
Residential Portfolio Segment [Member]
Loans receivable	6,909,000	2,380,000
Loans receivable	945,499,000	875,027,000
Deferred costs (fees)	42,000	(258,000)
Allowance for loan losses	(9,453,000)	(8,703,000)
Net loans receivable	$ 936,088,000	$ 866,066,000

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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