Note 20 - Assets and Liabilities Measured and Reported at Fair Value - Significant Unobservable Inputs (Details) - Fair Value, Inputs, Level 3 [Member] - Appraisal Discount Method [Member]	Dec. 31, 2018 USD ($)
Impaired Loans [Member]
Impaired loans - collateral dependent, fair value	$ 925,000
Impaired Loans [Member] | Weighted Average [Member]
Impaired loans - collateral dependent, weighted average of input	0.099
Other Real Estate Owned [Member]
OREO - collateral dependent, fair value	$ 1,018
Other Real Estate Owned [Member] | Weighted Average [Member]
OREO - collateral dependent, weighted average of input	0.122