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Note 10 - Income Taxes (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Nine Months Ended September 30,
 
   
2018
   
2017
 
                 
Current:
               
Federal
  $
---
    $
1,195,528
 
State
   
---
     
11,580
 
Total Current Provision
   
 
     
1,207,108
 
Deferred:
               
Federal
  $
(315,922
)   $
559,123
 
State
   
----
     
----
 
Total deferred
   
(315,922
)    
559,123
 
Income tax (benefit)/expense
  $
(315,922
)   $
1,766,231
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Nine Months Ended
 
   
September 30,
 
   
2018
   
2017
 
Income tax (benefit)/expense at federal statutory rate [21%-2018; 34%-2017]
  $
(652,837
)   $
2,075,004
 
Change in other accruals
   
45,540
     
90,781
 
Difference between tax and book depreciation
   
89,558
     
(201,847
)
Stock-based compensation
   
201,817
     
(197,707
)
Income tax (benefit)/expense
  $
(315,922
)   $
1,766,231