Note 13 - Other Expenses - Other Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Outside service fees	$ 2,533,000	$ 2,376,000	$ 2,234,000
Professional fees	704,000	925,000	612,000
Telephone and data communications	520,000	528,000	561,000
Business development	490,000	439,000	389,000
Director compensation, education and retirement	443,000	267,000	336,000
Armored car and courier	403,000	329,000	278,000
Advertising and promotion	395,000	433,000	372,000
Amortization of Core Deposit Intangible	263,000	27,000	6,000
Loan collection costs	227,000	216,000	194,000
Stationery and supplies	112,000	118,000	118,000
Deposit insurance	65,000	237,000	248,000
OREO expenses	61,000	76,000	73,000
Provision from change in OREO valuation	40,000	155,000	124,000
Net gain on sale of OREO	(275,000)	(47,000)	(130,000)
Other operating expense	509,000	662,000	351,000
Other non-interest expense	$ 6,490,000	$ 6,741,000	$ 5,766,000