GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Other Intangible Assets [Line Items]
Amortization		$ 1,900	$ 2,400	$ 3,700
Finite-Lived Intangible Assets, Accumulated Amortization		9,438	8,999
Indefinite-Lived Intangible Assets (Excluding Goodwill)		25,639	27,745
Other Intangible Assets, Net		16,201	18,746
Customer Lists
Goodwill and Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization		700	700	800
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		600
Finite-Lived Intangible Assets, Amortization Expense, Year Two		600
Finite-Lived Intangible Assets, Amortization Expense, Year Three		600
Finite-Lived Intangible Assets, Amortization Expense, Year Four		600
Finite-Lived Intangible Assets, Amortization Expense, Year Five		600
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		700
Finite-Lived Customer Lists, Gross		5,700
Indefinite-Lived Intangible Assets (Excluding Goodwill)		300
Technology-Based Assets
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		2,300
Finite-Lived Intangible Assets, Accumulated Amortization		300	300	300
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		200
Finite-Lived Intangible Assets, Amortization Expense, Year Two		200
Finite-Lived Intangible Assets, Amortization Expense, Year Three		200
Finite-Lived Intangible Assets, Amortization Expense, Year Four		200
Finite-Lived Intangible Assets, Amortization Expense, Year Five		200
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		700
Finite-Lived Customer Lists, Gross		500
Technology Rights
Goodwill and Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization		$ 200	200	68
Finite-Lived Intangible Asset, Useful Life		20 years
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		$ 200
Finite-Lived Intangible Assets, Amortization Expense, Year Two		200
Finite-Lived Intangible Assets, Amortization Expense, Year Three		200
Finite-Lived Intangible Assets, Amortization Expense, Year Four		200
Finite-Lived Intangible Assets, Amortization Expense, Year Five		200
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		100
Finite-Lived Customer Lists, Gross		1,600
Other Intangible Assets
Goodwill and Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization		$ 22	22	25
Finite-Lived Intangible Asset, Useful Life	[1]	0 years
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		$ 9,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two		3,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three		3,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four		2,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five		1,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)		600
Other Intangible Assets, Net		700
Product Certification [Member]
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		1,100
Finite-Lived Intangible Assets, Accumulated Amortization		300	200	200
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		300
Finite-Lived Intangible Assets, Amortization Expense, Year Two		200
Finite-Lived Intangible Assets, Amortization Expense, Year Three		71
Computer Software, Intangible Asset [Member]
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		1,200
Finite-Lived Intangible Assets, Accumulated Amortization		76	69	52
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		112
Finite-Lived Intangible Assets, Amortization Expense, Year Two		117
Finite-Lived Intangible Assets, Amortization Expense, Year Three		101
Finite-Lived Intangible Assets, Amortization Expense, Year Four		55
Finite-Lived Intangible Assets, Amortization Expense, Year Five		23
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		11
V Infinity
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		1,100
CUI
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		100
Finite-Lived Customer Lists, Gross		1,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)		1,900
Orbital
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		1,500
AMP Group
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		27
Order Backlog
Goodwill and Other Intangible Assets [Line Items]
Finite Lived Trade Marks And Trade Names		2,700
Finite-Lived Intangible Assets, Accumulated Amortization		0	400	1,800
Trademarks and Trade Names
Goodwill and Other Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization		400	$ 400	$ 400
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		300
Finite-Lived Intangible Assets, Amortization Expense, Year Two		200
Finite-Lived Intangible Assets, Amortization Expense, Year Three		100
Finite-Lived Intangible Assets, Amortization Expense, Year Four		100
Finite-Lived Intangible Assets, Amortization Expense, Year Five		100
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		200
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 4,900

[1] Other intangible assets are amortized over an appropriate useful life, as determined by management in relation to the other intangible asset characteristics.