RESTRUCTURING AND ASSET IMPAIRMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges								$ 2,026
Restructuring expenses, net and asset impairments								3,387	$ 19,503	$ 1,114
Severance expenses			$ 121
Proceeds from divestiture of businesses		$ 448
Reclassification of DynaEnergetics Siberia cumulative translation loss to Statement of Operations upon substantial liquidation					$ 10,420			0	10,420	0
DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 938
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments								1,361	5,641
Asset impairment | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments			$ 1,181				$ 6,231
Asset impairment | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	$ 181					$ 519
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges								1,195
Restructuring expenses, net and asset impairments								1,195	2,837	637
Severance | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							1,261
Severance | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments						$ 1,166
Other exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges								686
Restructuring expenses, net and asset impairments								$ 686	$ 10,753	$ 185
Other exit costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							268
Inventory write down | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							630
Accounts receivable write down | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments							$ 131