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Note 17 - Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Loans $ 10,306 $ 535
Other real estate owned 218 4,004
Total assets at fair value on a nonrecurring basis 10,524 4,539
Fair Value, Inputs, Level 1 [Member]    
Loans 0 0
Other real estate owned 0 0
Total assets at fair value on a nonrecurring basis 0 0
Fair Value, Inputs, Level 2 [Member]    
Loans 0 0
Other real estate owned 0 0
Total assets at fair value on a nonrecurring basis 0 0
Fair Value, Inputs, Level 3 [Member]    
Loans 10,306 535
Other real estate owned 218 4,004
Total assets at fair value on a nonrecurring basis $ 10,524 $ 4,539