SIGNIFICANT ACCOUNTING POLICIES - Rollforward of Allowance for Doubtful Accounts (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
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	2,299
Write-offs charged against the allowance	(962)
Impacts of foreign currency exchange rates and other	(34)
Allowance for doubtful accounts, March 31, 2020	2,320
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	1,987
Write-offs charged against the allowance	(962)
Impacts of foreign currency exchange rates and other	(34)
Allowance for doubtful accounts, March 31, 2020	1,986
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	0
Impacts of foreign currency exchange rates and other	0
Allowance for doubtful accounts, March 31, 2020	$ 334