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Investment in Associated Companies (Tables)
12 Months Ended
Dec. 31, 2019
Investments in Associated Companies [Abstract]  
Schedule of Equity Method Investments [Table Text Block]

 

 

 

Year Ended December 31,

 

 

 

 

2019

 

 

2018

 

 

2017

 

 

Houghton Korea

$

2,337

 

$

-

 

$

-

 

 

Nippon Japan

 

850

 

 

713

 

 

585

 

 

Kelko Panama

 

55

 

 

222

 

 

195

 

 

Kelko Venezuela

 

-

 

 

(138)

 

 

(42)

 

 

Primex

 

1,822

 

 

966

 

 

2,547

 

 

Total equity in net income of associated companies

$

5,064

 

$

1,763

 

$

3,285