Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)	Jul. 09, 2021	Apr. 20, 2021
Chief Technology Officer [Member] \| Subsequent Event [Member]
Annual Salary	$ 31,200
Clear Com Media, Inc [Member]
Share Exchange Agreement, Shares to Acquire (in shares)		10,000
Share Exchange Agreement, Shares to Issue (in shares)		4,000,000

The number of shares of company stock that will be issued under a share exchange agreement.

No definition available.

Name:	cenb_ShareExchangeAgreementSharesToIssue
Namespace Prefix:	cenb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant