Annual report pursuant to Section 13 and 15(d)

Note 18 - Fair Values of Financial Instruments - Assets Measured at Fair Value on a Recurring Basis (Details)

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Note 18 - Fair Values of Financial Instruments - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Securities available-for-sale $ 410,669 $ 277,219
Fair Value, Recurring [Member]    
Securities available-for-sale 410,669 277,219
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Securities available-for-sale 52,941 9,670
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Securities available-for-sale 356,799 266,473
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Securities available-for-sale 929 1,076
Money Market Funds [Member]    
Securities available-for-sale 52,941 9,670
Money Market Funds [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 52,941 9,670
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Securities available-for-sale 52,941 9,670
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Securities available-for-sale 0 0
Money Market Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Securities available-for-sale 0 0
US Government-sponsored Enterprises Debt Securities [Member]    
Securities available-for-sale 7,860  
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 7,860 13,058
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Securities available-for-sale 0 0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Securities available-for-sale 7,860 13,058
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Securities available-for-sale 0 0
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member]    
Securities available-for-sale 154,736 150,988
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 154,736 150,988
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Securities available-for-sale 0 0
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Securities available-for-sale 154,736 150,988
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Securities available-for-sale 0 0
US States and Political Subdivisions Debt Securities [Member]    
Securities available-for-sale 194,203 102,427
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 194,203 102,427
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Securities available-for-sale 0 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Securities available-for-sale 194,203 102,427
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Securities available-for-sale 0 0
Collateralized Debt Obligations [Member]    
Securities available-for-sale 929 1,076
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 929 1,076
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Securities available-for-sale 0 0
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Securities available-for-sale 0 0
Collateralized Debt Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Securities available-for-sale $ 929 $ 1,076