GOODWILL AND OTHER INTANGIBLE ASSETS (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 21,527	$ 21,887
CUI-Canada, Inc. acquisition		64
Currency translation adjustments	(1,402)	(424)
Balance	20,125	21,527
Power and Electro- Mechanical Segment [Member]
Balance	13,077	13,021
CUI-Canada, Inc. acquisition		64
Currency translation adjustments	6	(8)
Balance	13,083	13,077
Energy Segment [Member]
Balance	8,450	8,866
CUI-Canada, Inc. acquisition		0
Currency translation adjustments	(1,408)	(416)
Balance	7,042	8,450
Other Segment [Member]
Balance	0	0
CUI-Canada, Inc. acquisition		0
Currency translation adjustments	0
Balance	$ 0	$ 0