Note 17 - Fair Value Disclosure - Significant Unobservable Inputs Used in the Fair Value Measurements (Details) - Fair Value, Inputs, Level 3 [Member] - Valuation, Market Approach [Member] $ in Thousands		Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Minimum [Member] | Measurement Input, Discount for Lack of Marketability [Member]
Impaired Loans	[1]	0.1
OREO	[1]	0.1
Maximum [Member] | Measurement Input, Discount for Lack of Marketability [Member]
Impaired Loans	[1]	0.3
OREO	[1]	0.5
Fair Value, Measurements, Nonrecurring [Member]
Impaired Loans		$ 788	$ 2,866
Other Real Estate, Ending Balance		$ 46	$ 321

[1] Range includes discounts taken since appraisal and estimated values.