Note 13 - Income Taxes - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Allowance for Loan Losses	$ 2,356,000	$ 1,841,000
Acquried Loans Fair Market Value Adjustment	1,397,000	470,000
Acquired Securities Difference in Basis	(241,000)	(450,000)
Amortization of Start-Up Costs	17,000	26,000
Stock Warrants and Options	718,000	693,000
Depreciation	(517,000)	(476,000)
Interest on Acquired Nonaccrual Loans		25,000
Unrealized Loss on Securities	922,000	437,000
Other Real Estate	55,000	35,000
Core Deposit Intangible	1,656,000	421,000
Deposit Premium	67,000
Deferred Compensation	548,000	473,000
Alternative Minimum Tax Credit	193,000	310,000
Branch Closures	(47,000)
Net Operating Loss Carryforward	36,000	42,000
Net Deferred Tax Asset	$ 3,848,000	$ 3,005,000