RESTRUCTURING - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 192	$ 0	$ 553	$ 458
Equipment Moving Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	119
NobelClad
Restructuring Cost and Reserve [Line Items]
Additional restructuring expenses expected	550		550
Operating Segments | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	192		553
Operating Segments | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				458
Operating Segments | Severance | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	65		300
Operating Segments | Severance | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				20
Operating Segments | Equipment Moving Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses			119
Operating Segments | Asset Impairment | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				143
Operating Segments | Other Exit Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 8		$ 134
Operating Segments | Other Exit Costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				$ 295