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Note 11 - Income Taxes (Tables)
12 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Year Ended June
30,
 
   
2018
   
2017
 
Income tax benefit at statutory tax rate    
(1,736,580
)
  $
(992,759
)
State tax benefit
   
(498,648
)
   
(175,228
)
Permanent differences
   
(81,455
)    
30,213
 
Stock based compensation
   
(251,074
)    
(41,218
)
Impact of federal rate change    
4,868,970
     
 
Valuation allowance for remeausurement and changes relating to the Tax Cuts and Jobs Act    
(4,868,970
)    
 
Other valuation allowance
   
2,567,757
     
1,178,992
 
Income tax provision/(benefit)
  $
    $
 
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Year
Ended June 30,
 
   
2018
   
2017
 
Current:
               
Federal
  $
    $
 
State
  $
    $
 
Deferred:
               
Federal
  $
    $
 
State
  $
    $
 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   
Year Ended June
30,
 
   
2018
   
2017
 
Deferred tax asset:
               
Investment in the Joint Venture Company
  $
5,851,376
    $
8,747,508
 
State deferred tax assets
   
3,122,042
     
2,118,225
 
Stock option expenses
   
523,249
     
125,855
 
Net operating losses
   
2,454,203
     
3,260,495
 
Valuation allowance
   
(11,950,870
)
   
(14,252,083
)
Net deferred tax assets
  $
    $