SUBSEQUENT EVENT (Details) (Subsequent event)	Jul. 31, 2012 customer
Subsequent event
Subsequent event:
Number of customers affecting borrowing capacity due to agreement adjustment	1

Subsequent Event, Number of Customers Affecting Borrowing Capacity due to Agreement Amendment

No definition available.

Name:	rlog_SubsequentEventNumberOfCustomersAffectingBorrowingCapacityDueToAgreementAmendment
Namespace Prefix:	rlog_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant