Sale of Intellectual Property - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Sale Of Intellectual Property [Line Items]
Sale of intellectual property	$ 0	$ 300	$ 16,510
Intellectual Property Rights [Member]
Sale Of Intellectual Property [Line Items]
Sale of intellectual property		$ 300	$ 16,500