Segment and Major Customer Information (Detail)	3 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Customer One [Member]
Entity-Wide Revenue, Major Customer, Percentage	7.00%	11.00%
Customer Two [Member]
Entity-Wide Revenue, Major Customer, Percentage	12.00%	10.00%

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

No definition available.

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration