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Note 6 - Share-based Compensation (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
   
Three Months Ended March 31,
 
   
2018
   
2017
 
                 
Cost of sales
  $
17
    $
81
 
Selling, general and administrative expense
   
64
     
190
 
Total
  $
81
    $
271
 
Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Options Outstanding
   
Weighted-
Average
Exercise Price
   
Weighted-
Average
Remaining
Contractual
Life
   
Aggregate
Intrinsic Value
 
   
 
 
 
 
 
 
 
 
(in years)
   
(In thousands)
 
Balance, December 31, 2017
   
24,000
    $
24.15
     
 
     
 
 
Options granted
   
-
     
-
     
 
     
 
 
Options exercised
   
-
     
-
     
 
     
 
 
Options canceled
   
-
     
-
     
 
     
 
 
Balance, March 31, 2018
   
24,000
     
24.15
     
 
     
 
 
Exercisable, March 31, 2018
   
24,000
     
24.15
     
2.00
    $
-
 
Schedule of Unvested Restricted Stock Units and Performance Share Awards Activity [Table Text Block]
   
Number of
RSUs and
PSAs
(1)
   
Weighted-
Average Grant
Date Fair Value
 
Unvested RSUs as of December 31, 2017
   
169,583
    $
9.50
 
PSAs granted
   
43,077
     
19.97
 
Unvested PSAs canceled
   
(3,085
)    
19.97
 
RSUs vested
   
(169,583
)    
9.50
 
Unvested PSAs as of March 31, 2018
   
39,992
     
19.97