Note 3 - Loans (Details) - Non-accrual Loans - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 9,574	$ 5,199
Commercial and Industrial Portfolio Segment [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	5,769	1,381
Construction and Development Excluding Undeveloped Land Portfolio Segment [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	26	516
Real Estate Mortgage Portfolio Segment [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	3,764	3,302
Real Estate Mortgage Portfolio Segment [Member] | Commercial Investment [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	285	235
Real Estate Mortgage Portfolio Segment [Member] | Owner Occupied Commercial [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	3,035	2,081
Real Estate Mortgage Portfolio Segment [Member] | One to Four Family Residential [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	316	950
Real Estate Mortgage Portfolio Segment [Member] | Home Equity First Lien [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	91	0
Real Estate Mortgage Portfolio Segment [Member] | Home Equity Junior Lien [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	37	36
Consumer Portfolio Segment [Member]
Note 3 - Loans (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 15	$ 0