v3.3.1.900
Note 16 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   

December 31,

   

December 31,

 
   

2014

   

2013

 

Tax at federal statutory rate

  $ (740,000 )   $ (967,000 )

State taxes, net of federal benefit

    (117,000 )     (160,000 )

Research and development credits

          (12,000 )

Fair market value of warrants & derivatives

    17,000       (22,000 )

Stock-based compensation

    51,000       29,000  

Other permanent items

    10,000       1,000  

Valuation allowance

    779,000       1,131,000  

Income tax provision

  $     $  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   

December 31,

   

December 31,

 
   

2014

   

2013

 

Deferred tax assets:

               

Net operating loss and credit carryforwards

  $ 30,227,000     $ 29,431,000  

Stock-based compensation

    1,199,000       1,193,000  

Stock-based compensation

    422,000       558,000  

Basis difference for fixed assets and intangibles

    158,000       174,000  

Total gross deferred tax assets

    32,006,000       31,356,000  

Valuation allowance

    (32,006,000 )     (31,356,000 )

Net deferred tax assets

  $     $  
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
   

2014

   

2013

 

Balance, beginning of year

  $ 147,000     $ 140,000  
                 

Additions based on tax positions related to the current year

           

Additions for tax positions related to prior years

          7,000  

Reductions for tax positions related to prior years

           

Balance, end of year

  $ 147,000     $ 147,000