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Note 8 - Income Taxes (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
    Three months ended
June 30,
  Six months ended
June 30,
    2019   2018   2019   2018
Provision for Federal Income Taxes - Current   $
330,044
    $
374,032
    $
644,207
    $
684,150
 
Provision for Federal Income Taxes - Deferred    
(55,928
)    
(3,833
)    
(45,072
)    
(32,215
)
Total Provision for Income taxes   $
274,116
    $
370,199
    $
599,135
    $
651,935