SIGNIFICANT ACCOUNTING POLICIES - Rollforward of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, December 31, 2019	$ 967
Adjustment for cumulative effect from change in accounting principle	50
Current period provision for expected credit losses	3,381	$ 575	$ 282
Write-offs charged against the allowance	(1,429)
Recoveries of amounts previously reserved	(342)
Impacts of foreign currency exchange rates and other	(22)
Allowance for doubtful accounts, December 31, 2020	2,605	967
DynaEnergetics
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, December 31, 2019	945
Adjustment for cumulative effect from change in accounting principle	50
Current period provision for expected credit losses	3,069
Write-offs charged against the allowance	(1,243)
Recoveries of amounts previously reserved	(208)
Impacts of foreign currency exchange rates and other	(23)
Allowance for doubtful accounts, December 31, 2020	2,590	945
NobelClad
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, December 31, 2019	22
Adjustment for cumulative effect from change in accounting principle	0
Current period provision for expected credit losses	312
Write-offs charged against the allowance	(186)
Recoveries of amounts previously reserved	(134)
Impacts of foreign currency exchange rates and other	1
Allowance for doubtful accounts, December 31, 2020	$ 15	$ 22