SIGNIFICANT ACCOUNTING POLICIES - Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Inventory [Line Items]
Raw materials	$ 35,032	$ 25,153
Work-in-process	27,916	13,744
Finished goods	60,997	13,475
Supplies	269	201
Inventory, net	124,214	52,573
Arcadia
Inventory [Line Items]
Raw materials	12,168
Work-in-process	3,987
Finished goods	44,348
Supplies	0
Inventory, net	60,503
DynaEnergetics
Inventory [Line Items]
Raw materials	15,209	13,250
Work-in-process	13,672	7,062
Finished goods	14,998	12,806
Supplies	0	0
Inventory, net	43,879	33,118
NobelClad
Inventory [Line Items]
Raw materials	7,655	11,903
Work-in-process	10,257	6,682
Finished goods	1,651	669
Supplies	269	201
Inventory, net	$ 19,832	$ 19,455

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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