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Note 11 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Years ended December 31,
 
   
2012
   
2011
   
2010
 
Current
                 
Federal
  $ -     $ -     $ -  
Foreign
    -       12       -  
State
    -       2       (10 )
      -       14       (10 )
Deferred
                       
Federal
    -       -       -  
Foreign
    -       (12 )     4  
State
    -       -       -  
      -       (12 )     4  
Benefit from (provision for) income taxes
  $ -     $ 2     $ (6 )
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
   
December 31,
 
   
2012
   
2011
   
2010
 
                   
United States
  $ (5,471 )   $ (5,752 )   $ (8,410 )
Foreign subsidiaries
    (238 )     (305 )     (101 )
Loss before income taxes
  $ (5,709 )   $ (6,057 )   $ (8,511 )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Years ended December 31,
 
   
2012
   
2011
   
2010
 
United States statutory rate
    34.0 %     34.0 %     34.0 %
State taxes (net of federal tax benefit)
    1.8 %     2.7 %     (0.1 %)
Valuation allowance
    (27.8 %)     (34.4 %)     (33.7 %)
Other
    (8.0 %)     (2.3 %)     (0.2 %)
      0.0 %     0.0 %     0.0 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   
December 31,
 
   
2012
   
2011
   
2010
 
Allowance for doubtful accounts
  $ 53     $ 60     $ 87  
Accrued expenses and other reserves
    2,197       2,264       2,146  
Tax credits, deferred R&D, and other
    907       656       899  
Net operating loss
    25,980       24,931       22,088  
Valuation allowance
    (29,135 )     (27,909 )     (25,206 )
Net total deferred taxes
  $ 2     $ 2     $ 14