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Note Q - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
 
 
2015
 
 
2014
 
                 
Current asset:
 
 
 
 
 
 
 
 
Accrued compensation
  $ 75,000     $ 88,000  
Accounts receivable allowance
    5,000       8,000  
Non-current asset (liability):
 
 
 
 
 
 
 
 
Stock-based compensation
    258,000       174,000  
Basis differences in fixed assets
    (16,000
)
    (26,000
)
Basis differences in intangible assets
    55,000       (63,000
)
Net operating loss and credit carryforwards
    17,994,000       17,540,000  
Valuation allowances
    (18,372,000
)
    (17,721,000
)
                 
    $     $  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
 
 
2015
 
 
2014
 
                 
Federal statutory income tax rate
    34
%
    34
%
Permanent differences
         
)
Effect of net operating loss
    (34
)
    (34
)
                 
Effective tax rate
   
%
   
%