SIGNIFICANT ACCOUNTING POLICIES - Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes to the carrying amount of goodwill
Goodwill balance	$ 17,190,000	$ 32,762,000
Adjustment due to recognition of tax benefit of tax amortization of certain goodwill	(507,000)	(889,000)
Adjustment due to exchange rate differences	(586,000)	(3,219,000)
Goodwill impairment	0	(11,464,000)	$ 0
Goodwill balance	16,097,000	17,190,000	32,762,000
Operating segments [Member] | NobelClad [Member]
Changes to the carrying amount of goodwill
Goodwill balance	17,190,000	19,418,000
Adjustment due to recognition of tax benefit of tax amortization of certain goodwill	(507,000)	(326,000)
Adjustment due to exchange rate differences	(586,000)	(1,902,000)
Goodwill impairment		0
Goodwill balance	16,097,000	17,190,000	19,418,000
Operating segments [Member] | DynaEnergetics [Member]
Changes to the carrying amount of goodwill
Goodwill balance	0	13,344,000
Adjustment due to recognition of tax benefit of tax amortization of certain goodwill	0	(563,000)
Adjustment due to exchange rate differences	0	(1,317,000)
Goodwill impairment		(11,464,000)
Goodwill balance	$ 0	$ 0	$ 13,344,000