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Note 7 - Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
   
Value of Items Recorded at Fair Value
 
   
As of September 30, 2017
 
(in thousands)
 
Level 1
   
Level 2
   
Level 3
   
Total
 
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Metal Swaps
  $
-
    $
70
    $
-
    $
70
 
Total assets at fair value
 
$
-
   
$
70
   
$
-
   
$
70
 
                                 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Embedded customer derivative
  $
-
    $
40
    $
-
    $
40
 
Interest rate swap (CTI)
   
-
     
12
     
-
     
12
 
Total liabilities recorded at fair value
 
$
-
   
$
52
   
$
-
   
$
52
 
   
Value of Items Recorded at Fair Value
 
   
As of December 31, 2016
 
(in thousands)
 
Level 1
   
Level 2
   
Level 3
   
Total
 
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Embedded customer derivative
  $
-
    $
113
    $
-
    $
113
 
Total assets at fair value
 
$
-
   
$
113
   
$
-
   
$
113
 
                                 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Metals swaps
  $
-
    $
113
    $
-
    $
113
 
Interest rate swap (CTI)
   
-
     
36
     
-
     
36
 
Total liabilities recorded at fair value
 
$
-
   
$
149
   
$
-
   
$
149
 
Fair Value, by Balance Sheet Grouping [Table Text Block]
   
Value of Items Not Recorded at Fair Value
 
   
As of September 30, 2017
 
(in thousands)
 
Level 1
   
Level 2
   
Level 3
   
Total
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
IRB
  $
930
    $
-
    $
-
    $
930
 
Revolver
   
-
     
220,409
     
-
     
220,409
 
Total liabilities not recorded at fair value
 
$
930
   
$
220,409
   
$
-
   
$
221,339
 
   
Value of Items Not Recorded at Fair Value
 
   
As of December 31, 2016
 
(in thousands)
 
Level 1
   
Level 2
   
Level 3
   
Total
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
IRB
  $
1,825
    $
-
    $
-
    $
1,825
 
Revolver
   
-
     
164,599
     
-
     
164,599
 
Total liabilities not recorded at fair value
 
$
1,825
   
$
164,599
   
$
-
   
$
166,424