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Note 9 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Years ended December 31,
   
2019
 
2018
 
2017
Current
 
$
2,682
    $
2,942
    $
2,943
 
Deferred expense (benefit)
 
 
529
     
(382
)
   
1,790
 
Deferred tax adjustment for enacted change in tax rate
 
 
---
     
---
     
1,560
 
Total income tax expense
 
$
3,211
    $
2,560
    $
6,293
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Years ended December 31,
   
2019
2018
 
2017
Computed “expected” income tax expense
 
$
4,342
    $
3,929
    $
7,135
 
Tax impact of enacted change in tax rate
 
 
---
     
---
     
1,560
 
Tax-exempt interest income
 
 
(1,019
)
   
(1,255
)
   
(2,144
)
Nondeductible interest expense
 
 
96
     
69
     
89
 
Other, net
 
 
(208
)
   
(183
)
   
(347
)
Reported income tax expense
 
$
3,211
    $
2,560
    $
6,293
 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   
December 31,
   
2019
 
2018
Deferred tax assets:
               
Allowance for loan losses and unearned fee income
 
$
1,597
    $
1,683
 
Valuation allowance on other real estate owned
 
 
186
     
223
 
Defined benefit plan
 
 
2,281
     
1,864
 
Deferred compensation and other liabilities
 
 
848
     
1,308
 
Net unrealized loss on securities available for sale
 
 
---
     
1,348
 
Lease accounting
 
 
2
     
---
 
Total deferred tax assets
 
$
4,914
    $
6,426
 
                 
Deferred tax liabilities:
               
Fixed assets
 
$
(438
)
  $
(365
)
Goodwill and deposit intangibles
 
 
(1,228
)
   
(1,169
)
Defined benefit plan, prepaid portion
 
 
(1,308
)
   
(1,465
)
Net unrealized gain on securities available for sale
 
 
(20
)
   
---
 
Discount accretion of securities
 
 
(43
)
   
(70
)
Total deferred tax liabilities
 
 
(3,037
)
   
(3,069
)
Net deferred tax assets
 
$
1,877
    $
3,357