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Note 7 - Share-based Compensation (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   
Three Months Ended March 31,
 
   
2019
   
2018
 
                 
Cost of sales
  $
6
    $
17
 
Selling, general, and administrative expense
   
16
     
64
 
Total
  $
22
    $
81
 
Share-based Payment Arrangement, Option, 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, 2018
   
24,000
    $
24.15
     
 
     
 
 
Options granted
   
-
     
-
     
 
     
 
 
Options exercised
   
-
     
-
     
 
     
 
 
Options canceled
   
-
     
-
     
 
     
 
 
Balance, March 31, 2019
   
24,000
     
24.15
     
 
     
 
 
Exercisable, March 31, 2019
   
24,000
     
24.15
     
1.00
    $
-
 
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 PSAs as of December 31, 2018
   
39,992
    $
19.97
 
RSUs and PSAs granted
   
86,701
     
23.56
 
Unvested RSUs and PSAs canceled
   
-
     
-
 
PSAs vested
(2)
   
(39,992
)    
19.97
 
Unvested RSUs and PSAs as of March 31, 2019
   
86,701
     
23.56