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Note 9 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Years Ended December 31,
 
   
201
7
   
201
6
 
Current:
               
Federal
  $
-
    $
(70
)
State
   
-
     
20
 
Foreign
   
300
     
13
 
     
300
     
(37
)
Deferred:
               
Federal
   
(1,717
)    
220
 
State
   
55
     
-
 
Foreign
   
(7
)    
(85
)
     
(1,669
)    
135
 
Total income tax provision
  $
(1,369
)   $
98
 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   
Years Ended December 31,
 
   
2017
   
2016
 
Deferred Tax Liabilities:
               
Property, Plant and Equipment
  $
-
    $
-
 
Other    
38
     
-
 
Intangible Assets
   
3,806
     
5,471
 
Total Deferred Tax Liabilities
   
3,844
     
5,471
 
                 
Deferred Tax Assets:
               
Property, Plant and Equipment
   
44
     
77
 
Net Operating Loss Carryforwards
   
17,870
     
27,127
 
Tax Credit Carryforwards
   
1,837
     
1,704
 
Intangible Assets
   
1,535
     
2,923
 
Accrued Expenses, Reserves and Other
   
1,359
     
1,527
 
Total Deferred Tax Assets
   
22,645
     
33,358
 
Valuation Allowance for Deferred Tax Assets
   
(22,636
)    
(33,331
)
Net Deferred Tax Assets
   
9
     
27
 
                 
Net Deferred Tax Liabilities
  $
3,835
    $
5,444
 
Schedule of Net Deferred Tax Liabilities [Table Text Block]
   
Years Ended December 31,
 
   
201
7
   
2016
 
                 
Non-Current Deferred Tax Assets
  $
32
    $
94
 
Non-Current Deferred Tax Liabilities
   
(3,867
)    
(5,538
)
    $
(3,835
)   $
(5,444
)
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
   
Years Ended December 31,
 
   
201
7
   
2016
 
United States
  $
4,831
    $
2,803
 
Foreign
   
1,464
     
777
 
    $
6,295
    $
3,580
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Years Ended December 31,
 
   
2017
   
2016
 
                 
Statutory Income Tax Rate
   
34
%    
34.0
%
(Increase) Decrease in Tax Provision Resulting From:
               
Equity Compensation
   
0.7
     
9.6
 
Income Tax Credits
   
(0.9
)    
(6.2
)
Foreign Tax Rates
   
(3.8
)    
(2.2
)
Release of Unrecognized Tax Benefits
   
-
     
-
 
Valuation Allowance
   
(20.9
)    
(30
)
Excess Accrual
   
-
     
(5.2
)
Tax Rate Change    
(30.8
)    
-
 
Other
   
(0.1
)    
2.7
 
Effective Income Tax Rate
   
(21.8
)%    
2.7
%