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Note 12 - Condensed Financial Statements of Parent Company - Condensed Statements of Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income      
Other income $ 1,093 $ 1,346 $ 806
Expenses      
Income before income tax benefit and equity in undistributed net income of subsidiaries 19,154 20,677 18,711
Applicable income tax benefit 3,077 3,211 2,560
Net income 16,077 17,466 16,151
Parent Company [Member]      
Income      
Dividends from subsidiaries 22,000 28,556 9,419
Other income 4 18 10
Total income 22,004 28,574 9,429
Expenses      
Other expenses 1,179 1,025 1,244
Income before income tax benefit and equity in undistributed net income of subsidiaries 20,825 27,549 8,185
Applicable income tax benefit 301 266 308
Income before equity in undistributed net income of subsidiaries 21,126 27,815 8,493
Equity (deficit) in undistributed net income of subsidiaries (5,049) (10,349) 7,658
Net income $ 16,077 $ 17,466 $ 16,151