BUSINESS SEGMENTS - Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment information
Number of segments | segment			2
Net sales	$ 55,281	$ 100,094	$ 172,048	$ 311,183
Segment operating income	1,465	12,821	(178)	57,926
Other (expense) income, net	(148)	170	(118)	492
Interest expense, net	(170)	(387)	(564)	(1,169)
Income (loss) before income taxes	1,147	12,604	(860)	57,249
Depreciation and amortization	2,820	2,617	8,243	7,367
Operating Segments
Segment information
Segment operating income	4,654	17,130	9,827	70,806
Depreciation and amortization	2,745	2,617	8,004	7,367
Segment Reconciling Items
Segment information
Unallocated corporate expenses	(1,594)	(3,067)	(5,851)	(8,972)
Stock-based compensation	(1,595)	(1,242)	(4,154)	(3,908)
Other (expense) income, net	(148)	170	(118)	492
Interest expense, net	(170)	(387)	(564)	(1,169)
Corporate and other
Segment information
Depreciation and amortization	75	0	239	0
DynaEnergetics
Segment information
Net sales	34,201	77,356	111,065	245,820
DynaEnergetics | Operating Segments
Segment information
Segment operating income	2,171	14,911	3,886	64,834
Depreciation and amortization	1,866	1,772	5,410	4,890
NobelClad
Segment information
Net sales	21,080	22,738	60,983	65,363
NobelClad | Operating Segments
Segment information
Segment operating income	2,483	2,219	5,941	5,972
Depreciation and amortization	$ 879	$ 845	$ 2,594	$ 2,477