Summary of Significant Accounting Policies (Details 2)	12 Months Ended
Sep. 30, 2012
Minimum
Concentration of Credit
Receivables due	30 days
Maximum
Concentration of Credit
Receivables due	60 days

Represents the period for which financing receivables are generally due.

No definition available.

Name:	rocm_FinancingReceivablesDue
Namespace Prefix:	rocm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration