BUSINESS SEGMENTS - Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment information
Number of segments | segment	2
Net sales	$ 73,564	$ 100,135
Segment operating income	6,347	20,452
Other income (expense), net	115	(21)
Interest expense, net	(238)	(373)
Income before income taxes	6,224	20,058
Depreciation and amortization	2,706	2,196
Operating Segments
Segment information
Segment operating income	10,082	24,940
Depreciation and amortization	2,606	2,196
Segment Reconciling Items
Segment information
Unallocated corporate expenses	(2,617)	(3,317)
Stock-based compensation	(1,118)	(1,171)
Other income (expense), net	115	(21)
Interest expense, net	(238)	(373)
Corporate and other
Segment information
Depreciation and amortization	100	0
DynaEnergetics
Segment information
Net sales	53,220	79,836
DynaEnergetics | Operating Segments
Segment information
Segment operating income	8,606	23,110
Depreciation and amortization	1,772	1,399
NobelClad
Segment information
Net sales	20,344	20,299
NobelClad | Operating Segments
Segment information
Segment operating income	1,476	1,830
Depreciation and amortization	$ 834	$ 797