Note 14 - Financial Instruments - Assets Recorded at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investment securities available for sale	$ 32,881	$ 45,428
Fair Value, Inputs, Level 1 [Member]
Investment securities available for sale
Fair Value, Inputs, Level 2 [Member]
Investment securities available for sale	32,881	45,428
Fair Value, Inputs, Level 3 [Member]
Investment securities available for sale
US Government Agencies Debt Securities [Member]
Investment securities available for sale		245
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available for sale
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available for sale		245
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available for sale
Collateralized Mortgage Backed Securities [Member]
Investment securities available for sale	19,504	24,763
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available for sale
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available for sale	19,504	24,763
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available for sale
Corporate Debt Securities [Member]
Investment securities available for sale	1,433	2,789
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available for sale
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available for sale	1,433	2,789
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available for sale
US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale	11,944	17,631
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Investment securities available for sale
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Investment securities available for sale	11,944	17,631
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Investment securities available for sale