Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details)

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Note 4 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details)
$ in Thousands
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Estimated fair value, less than 12 months $ 6,058 $ 13,226
Unrealized losses, less than 12 months (89) (76)
Estimated fair value, 12 months or longer 773 16,141
Unrealized losses, 12 months or longer (1,424) (1,191)
Estimated fair value, total 6,831 29,367
Unrealized losses, total $ (1,513) $ (1,267)
Unrealized losses, less than 12 months, number of securities 5 11
Unrealized losses, 12 months or longer, number of securities 2 17
Unrealized losses, total, number of securities 7 28
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member]    
Estimated fair value, less than 12 months $ 2,480 $ 8,859
Unrealized losses, less than 12 months (63) (31)
Estimated fair value, 12 months or longer 15,065
Unrealized losses, 12 months or longer (65)
Estimated fair value, total 2,480 23,924
Unrealized losses, total (63) (96)
US Government-sponsored Enterprises Debt Securities [Member]    
Estimated fair value, less than 12 months  
Unrealized losses, less than 12 months  
Estimated fair value, 12 months or longer  
Unrealized losses, 12 months or longer  
Estimated fair value, total  
Unrealized losses, total  
US States and Political Subdivisions Debt Securities [Member]    
Estimated fair value, less than 12 months 3,578 4,367
Unrealized losses, less than 12 months (26) (45)
Estimated fair value, 12 months or longer
Unrealized losses, 12 months or longer
Estimated fair value, total 3,578 4,367
Unrealized losses, total (26) (45)
Collateralized Debt Obligations [Member]    
Estimated fair value, less than 12 months
Unrealized losses, less than 12 months
Estimated fair value, 12 months or longer 773 1,076
Unrealized losses, 12 months or longer (1,424) (1,126)
Estimated fair value, total 773 1,076
Unrealized losses, total $ (1,424) $ (1,126)