Basis Of Presentation - Additional Information (Detail) (Orbital Gas Systems Limited)	Apr. 30, 2013
Orbital Gas Systems Limited
Business Description and Basis Of Presentation [Line Items]
Business combination percentage equity interest in acquire	100.00%

Business combination percentage equity interest in acquire

No definition available.

Name:	cui_BusinessCombinationPercentageEquityInterestInAcquiree
Namespace Prefix:	cui_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant