BUSINESS SEGMENTS - Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment information
Number of segments | segment	2
Net sales	$ 55,658	$ 73,564
Segment operating income	(710)	6,347
Other income, net	394	115
Interest expense, net	(135)	(238)
(Loss) income before income taxes	(451)	6,224
Depreciation and amortization	3,022	2,706
Operating Segments
Segment information
Segment operating income	3,125	10,082
Depreciation and amortization	2,939	2,606
Segment Reconciling Items
Segment information
Unallocated corporate expenses	(2,227)	(2,617)
Stock-based compensation	(1,608)	(1,118)
Other income, net	394	115
Interest expense, net	(135)	(238)
Corporate and other
Segment information
Depreciation and amortization	83	100
DynaEnergetics
Segment information
Net sales	38,172	53,220
DynaEnergetics | Operating Segments
Segment information
Segment operating income	1,521	8,606
Depreciation and amortization	2,000	1,772
NobelClad
Segment information
Net sales	17,486	20,344
NobelClad | Operating Segments
Segment information
Segment operating income	1,604	1,476
Depreciation and amortization	$ 939	$ 834