SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Summary of Segment Information

	Three Months Ended March 31, 2021
	Specialty Petrochemicals		Specialty Waxes		Corporate		Eliminations		Consolidated
	(in thousands)
Product sales	$	44,658	$	6,907	$	—	$	—	$	51,565
Processing fees	1,254		1,766		—		—		3,020
Total revenues	45,912		8,673		—		—		54,585
Operating income (loss) before depreciation and amortization	2,571		(481)		(3,023)		—		(933)
Operating loss	(231)		(1,957)		(3,025)		—		(5,213)
Loss from continuing operations before taxes	(297)		(1,954)		(3,154)		—		(5,405)
Depreciation and amortization	2,802		1,476		3		—		4,281
Capital expenditures	3,567		1,214		—		—		4,781

	Three Months Ended March 31, 2020
	Specialty Petrochemicals		Specialty Waxes		Corporate		Eliminations	Consolidated
	(in thousands)
Product sales	$	50,386	$	6,797	$	—	—	$	57,183
Processing fees	1,244		3,640		—		—	4,884
Total revenues	51,630		10,437		—		—	62,067
Operating income (loss) before depreciation and amortization	6,490		1,066		(2,415)		—	5,141
Operating income (loss)	3,872		(262)		(2,422)		—	1,188
Income (loss) from continuing operations before taxes	2,942		(242)		(2,490)		—	210
Depreciation and amortization	2,617		1,328		7		—	3,952
Capital expenditures	1,601		316		—		—	1,917

	March 31, 2021
	Specialty Petrochemicals	Specialty Waxes	Corporate	Eliminations	Consolidated
	(in thousands)
Intangible assets, net	—	12,433	—	—	12,433
Total assets	285,549	81,194	124,744	(181,088)	310,399

	December 31, 2020
	Specialty Petrochemicals	Specialty Waxes	Corporate	Eliminations	Consolidated
	(in thousands)
Intangible assets, net	—	12,893	—	—	12,893
Total assets	298,198	83,108	127,260	(191,733)	316,833