Note 22 - Parent Company-only Financial Statements - Condensed Balance Sheets (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noninterest bearing deposits and cash	$ 2,693,000	$ 7,381,000
Other assets	9,526,000	4,816,000
Total assets	979,836,000	951,696,000
Borrowings	130,900,000	131,000,000
Shareholders' equity	66,994,000	69,340,000	$ 66,749,000	$ 62,570,000
Total liabilities and shareholders' equity	979,836,000	951,696,000
Parent Company [Member]
Noninterest bearing deposits and cash	667,000	2,443,000
Investment in subsidiary	96,235,000	96,883,000
Other assets	564,000	59,000
Total assets	97,466,000	99,385,000
Borrowings	29,707,000	29,595,000
Accrued expenses and other liabilities	765,000	450,000
Shareholders' equity	66,994,000	69,340,000
Total liabilities and shareholders' equity	$ 97,466,000	$ 99,385,000