SIGNIFICANT ACCOUNTING POLICIES - Rollforward of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, December 31, 2020		$ 2,605
Current period provision for expected credit losses	$ 58	96
Recoveries of amounts previously reserved		(10)
Impacts of foreign currency exchange rates and other		(1)
Allowance for doubtful accounts, June 30, 2021	2,690	2,690
DynaEnergetics
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, December 31, 2020		2,590
Current period provision for expected credit losses		96
Recoveries of amounts previously reserved		(10)
Impacts of foreign currency exchange rates and other		(1)
Allowance for doubtful accounts, June 30, 2021	2,675	2,675
NobelClad
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, December 31, 2020		15
Current period provision for expected credit losses		0
Recoveries of amounts previously reserved		0
Impacts of foreign currency exchange rates and other		0
Allowance for doubtful accounts, June 30, 2021	$ 15	$ 15