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Note 9 - Income Taxes (Tables)
9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Nine
Months Ended September 30,
 
   
2017
   
20
16
 
                 
Current:
               
Federal
  $
1,195,528
    $
(71,070
)
State
   
11,580
     
314
 
Total Current income tax provision/(benefit)
   
1,207,108
     
(70,756
)
Deferred:
               
Federal
  $
559,123
    $
(836,616
)
State
   
----
     
---
 
Total deferred income tax provision/(benefit)
   
559,123
     
(836,616
)
Income tax
expense/(benefit)
  $
1,766,231
    $
(907,372
)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Nine
Months Ended
 
   
September
30,
 
   
201
7
   
201
6
 
Income tax benefit at federal statutory rate [34%]
  $
2,075,004
    $
(620,882
)
Change in other accruals
   
90,781
     
(216,640
)
Difference between tax and book depreciation
   
(201,847
)    
50,213
 
Stock-based compensation
   
(197,707
)    
(48,993
)
Provision
for tax return true up
   
----
     
(71,070
)
Income tax expense
  $
1,766,231
    $
(907,372
)