Commitments and Contingencies (Details 3) (Byrne Medical Business)	9 Months Ended
Apr. 30, 2013
Byrne Medical Business
Compensation agreements
Compensation agreement term	3 years

The term of compensation agreement entered into by the entity with certain employees of acquired business.

No definition available.

Name:	cmn_CompensationAgreementTerm
Namespace Prefix:	cmn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration