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Note 9 - Investments (Tables)
 9 Months Ended
Sep. 30, 2016
Notes Tables  
Investment Gain on Realignment [Table Text Block]
Cash
$
4,818 
Carrying Value of Dow Corning Equity Investment
 
(1,560)
Carrying Value of HSG Equity Investment
 
(383)
Other 
(1)
 
(199)
Gain
$
2,676 
Equity Method Investments [Table Text Block]
 
Ownership
interest
 
September 30,
2016
 
December 31,
2015
Affiliated companies accounted for by the equity method
 
 
 
 
 
 
 
 
 
Dow Corning 
(1)
 
50%
 
 
 
 
 
$
1,483
All other 
(1)
20%
to
50%
 
$
285
 
 
422
 
 
 
 
 
 
285
 
 
1,905
Other investments
 
 
 
 
 
67
 
 
70
Subtotal Investment Assets
 
 
 
 
$
352
 
$
1,975
 
 
 
 
 
 
 
 
 
 
Affiliated companies accounted for by the equity method
 
 
 
 
 
 
 
 
 
HSG 
(2)(3)
 
50%
 
 
$
343
 
 
 
Subtotal Investment Liabilities
 
 
 
 
$
343