Note 5 - Advance on Business Acquisition (Details Textual) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Advance on Business Acquisition	$ 425,328

The amount of advance to an unrelated party in anticipation of acquiring an operating business.

No definition available.

Name:	cenb_AdvanceOnBusinessAcquisition
Namespace Prefix:	cenb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant