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Note 9 - Income Taxes (Tables)
6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Six Months Ended June 30,
 
   
2016
   
2015
 
                 
Current:
               
Federal
  $ (71,070 )   $ 645,116  
State
    --       12,173  
Total Current Provision
    (71,070 )     657,289  
Deferred:
               
Federal
  $ (632,992 )   $ 26,920  
State
    ----       ----  
Total deferred
    (632,992 )     26,920  
                 
Income tax expense/(benefit)
  $ (704,062 )   $ 684,209  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Six Months Ended
 
   
June 30,
 
   
2016
   
2015
 
Income tax benefit at federal statutory rate [34%]
  $ (353,981 )   $ 913,700  
Change in other accruals
    (50,866 )     23,175  
Difference between tax and book depreciation
    (53,112 )     (12,975 )
Stock-based compensation
    (117,727 )     (28,120 )
Research and development credits
    (57,306 )     (571,583 )
Domestic production activities deduction
    --       (83,411 )
Net operating loss carryforward
    --       954,581  
Tax carryback
    --       (511,158 )
Provision for 2014 tax return true up
    (71,070 )
 
 
--
 
Income tax (benefit)/expense
  $ (704,062 )   $ 684,209