Quarterly report pursuant to Section 13 or 15(d)

SEGMENT INFORMATION (Details)

v3.7.0.1
SEGMENT INFORMATION (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Net revenues $ 55,542 $ 52,200  
Operating profit (loss) before depreciation and amortization 6,780 8,541  
Operating profit (loss) 4,192 6,145  
Profit (loss) before taxes 2,548 10,871  
Depreciation and amortization 2,588 2,396  
Capital expenditures 13,881 7,602  
Goodwill and intangible assets, net 44,002   $ 44,467
Total assets 295,553   290,484
Product Sales [Member]      
Segment Reporting Information [Line Items]      
Net revenues 50,899 47,181  
Processing Fees [Member]      
Segment Reporting Information [Line Items]      
Net revenues 4,643 5,019  
Operating Segments [Member] | Petrochemical [Member]      
Segment Reporting Information [Line Items]      
Net revenues 45,879 44,065  
Operating profit (loss) before depreciation and amortization 8,214 8,412  
Operating profit (loss) 6,658 7,075  
Profit (loss) before taxes 6,005 6,449  
Depreciation and amortization 1,556 1,337  
Capital expenditures 8,756 5,662  
Goodwill and intangible assets, net 0   0
Total assets 228,280   219,376
Operating Segments [Member] | Petrochemical [Member] | Product Sales [Member]      
Segment Reporting Information [Line Items]      
Net revenues 44,391 42,624  
Operating Segments [Member] | Petrochemical [Member] | Processing Fees [Member]      
Segment Reporting Information [Line Items]      
Net revenues 1,488 1,441  
Operating Segments [Member] | Specialty Wax [Member]      
Segment Reporting Information [Line Items]      
Net revenues 9,663 8,135  
Operating profit (loss) before depreciation and amortization 745 2,062  
Operating profit (loss) (271) 1,011  
Profit (loss) before taxes (290) 1,006  
Depreciation and amortization 1,016 1,051  
Capital expenditures 5,125 1,940  
Goodwill and intangible assets, net 44,002   44,467
Total assets 116,765   113,676
Operating Segments [Member] | Specialty Wax [Member] | Product Sales [Member]      
Segment Reporting Information [Line Items]      
Net revenues 6,508 4,557  
Operating Segments [Member] | Specialty Wax [Member] | Processing Fees [Member]      
Segment Reporting Information [Line Items]      
Net revenues 3,155 3,578  
Eliminations [Member]      
Segment Reporting Information [Line Items]      
Goodwill and intangible assets, net 0   0
Total assets (148,510)   (148,996)
Corporate [Member]      
Segment Reporting Information [Line Items]      
Net revenues 0 0  
Operating profit (loss) before depreciation and amortization (2,179) (1,933)  
Operating profit (loss) (2,195) (1,941)  
Profit (loss) before taxes (3,167) 3,416  
Depreciation and amortization 16 8  
Capital expenditures 0 0  
Goodwill and intangible assets, net 0   0
Total assets 99,018   $ 106,428
Corporate [Member] | Product Sales [Member]      
Segment Reporting Information [Line Items]      
Net revenues 0 0  
Corporate [Member] | Processing Fees [Member]      
Segment Reporting Information [Line Items]      
Net revenues $ 0 $ 0