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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Income Taxes [Abstract]  
Summary of the deferred tax assets and liabilities
  December 31, 
  2017  2016 
       
Deferred tax assets (liabilities):      
Reserves $12  $35 
Property and equipment  80   171 
Accrued expenses  619   1,034 
Severance  56   39 
Non-qualified stock options  268   420 
Net foreign carryforwards  1,906   1,844 
Net operating loss and credit carryforwards  6,801   8,054 
Intangibles  605   907 
         
Total deferred tax assets  10,347   12,504 
Valuation allowance  (10,896)  (13,114)
         
Net deferred tax liabilities $(549) $(610)
Summary of tax provision
    Year ended December 31,  
    2017     2016  
Tax provision summary            
State income tax   $ 21     $ 18  
Deferred tax benefit, release of valuation allowance     -       (635 )
Deferred tax benefit - federal     2,382       (1,101 )
Deferred tax benefit - state     (149 )     (89 )
Deferred tax benefit - foreign     (75 )     (453 )
Change in valuation allowance     (2,218 )     1,895  
Tax (benefit)/expense   $ (39 )   $ (365 )
Summary of reconciliation statutory income tax
    2017     2016  
Federal statutory rate     -34.00 %     -34.00 %
State taxes     -2.44 %     -2.75 %
Foreign rate differential     -0.08 %     3.11 %
Other     3.55 %     1.68 %
Impact of Tax Act     3.10 %     0 %
Changes in valuation allowance     -37.79 %     36.72 %
Effective tax rate     -67.66 %     4.80 %