RESTRUCTURING EXPENSES - Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 127	$ 1,116
DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		938
NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		59
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	116	880
Severance | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		707
Severance | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		54
Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		11
Contract Termination Costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		11
Contract Termination Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		0
Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	11	225
Other Exit Costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		220
Other Exit Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		5
Operating Segments | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	127
Operating Segments | Severance | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	116
Operating Segments | Other Exit Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 11
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		119
Corporate | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		119
Corporate | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		0
Corporate | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		$ 0