RESTRUCTURING AND ASSET IMPAIRMENTS - Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						$ 127	$ 3,387	$ 19,503
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						116	1,195	2,837
Asset Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							1,361	5,641
Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							19	39
Equipment Moving Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							126	233
Other Exist Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						11	686	10,753
DynaEnergetics | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments					$ 1,261
DynaEnergetics | Asset Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments			$ 1,181		6,231
DynaEnergetics | Other Exist Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments					$ 268
NobelClad | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	$ 116							1,166
NobelClad | Asset Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments		$ 181		$ 519
Operating segments | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							2,922	18,631
Operating segments | DynaEnergetics | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							936	1,671
Operating segments | DynaEnergetics | Asset Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							1,181	6,277
Operating segments | DynaEnergetics | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							19	0
Operating segments | DynaEnergetics | Equipment Moving Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							126	0
Operating segments | DynaEnergetics | Other Exist Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							660	10,683
Operating segments | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						127	346	872
Operating segments | NobelClad | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						116	140	1,166
Operating segments | NobelClad | Asset Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							180	(636)
Operating segments | NobelClad | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							0	39
Operating segments | NobelClad | Equipment Moving Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							0	233
Operating segments | NobelClad | Other Exist Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						$ 11	26	$ 70
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							119
Corporate | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							119
Corporate | Asset Impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							0
Corporate | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							0
Corporate | Equipment Moving Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							0
Corporate | Other Exist Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							$ 0