Note 8 - Fair Values Measurement - Financial Assets Measured at the Fair Value on Recurring and Non-recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 |
Securities available for sale | $ 184,870 | $ 152,720 |
Recorded investment, total | 3,804 | 7,173 |
Fair Value, Measurements, Recurring [Member] | | |
Securities available for sale | 184,870 | 152,720 |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Securities available for sale | | |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Securities available for sale | 184,870 | 152,720 |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Securities available for sale | | |
US Treasury and Government [Member] | | |
Securities available for sale | 22,650 | 21,624 |
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member] | | |
Securities available for sale | 22,650 | 21,624 |
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Securities available for sale | | |
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Securities available for sale | 22,650 | 21,624 |
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Securities available for sale | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | | |
Recorded investment, total | | 87 |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Recorded investment, total | | 87 |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Farmland Loans [Member] | | |
Recorded investment, total | 124 | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Construction Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Farmland Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Nonfarm Nonresidential [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Construction Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Farmland Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Nonfarm Nonresidential [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Construction Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Farmland Loans [Member] | | |
Recorded investment, total | 124 | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Nonfarm Nonresidential [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Multifamily Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | One- to Four-family Residential Properties [Member] | | |
Recorded investment, total | 562 | 957 |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Multifamily Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | One- to Four-family Residential Properties [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Multifamily Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | One- to Four-family Residential Properties [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Multifamily Loans [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | One- to Four-family Residential Properties [Member] | | |
Recorded investment, total | 562 | 957 |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer Portfolio Segment [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture Portfolio Segment [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Portfolio Segment [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Recorded investment, total | | |
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Recorded investment, total | | |
Residential Mortgage Backed Securities [Member] | | |
Securities available for sale | 85,812 | 64,965 |
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | | |
Securities available for sale | 85,812 | 64,965 |
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Securities available for sale | | |
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Securities available for sale | 85,812 | 64,965 |
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Securities available for sale | | |
Collateralized Debt Obligations [Member] | | |
Securities available for sale | 34,876 | 25,505 |
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | | |
Securities available for sale | 34,876 | 25,505 |
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Securities available for sale | | |
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Securities available for sale | 34,876 | 25,505 |
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Securities available for sale | | |
US States and Political Subdivisions Debt Securities [Member] | | |
Securities available for sale | 32,648 | 33,710 |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | | |
Securities available for sale | 32,648 | 33,710 |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Securities available for sale | | |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Securities available for sale | 32,648 | 33,710 |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Securities available for sale | | |
Corporate Debt Securities [Member] | | |
Securities available for sale | 8,884 | 6,916 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | | |
Securities available for sale | 8,884 | 6,916 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Securities available for sale | | |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Securities available for sale | 8,884 | 6,916 |
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Securities available for sale | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | | |
Other real-estate | 3,750 | 4,335 |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Farmland Loans [Member] | | |
Other real-estate | | 74 |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Construction Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Farmland Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Nonfarm Nonresidential [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Construction Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Farmland Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Nonfarm Nonresidential [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Construction Loans [Member] | | |
Other real-estate | 3,750 | 4,335 |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Farmland Loans [Member] | | |
Other real-estate | | 74 |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Nonfarm Nonresidential [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Multifamily Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | One- to Four-family Residential Properties [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Multifamily Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | One- to Four-family Residential Properties [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Multifamily Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | One- to Four-family Residential Properties [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Multifamily Loans [Member] | | |
Other real-estate | | |
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | One- to Four-family Residential Properties [Member] | | |
Other real-estate | | |