Common Stock Warrants - Schedule of Common Stock Warrant Activity (Detail) (Warrant [Member], Series D Preferred Stock [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Warrant [Member] | Series D Preferred Stock [Member]
Number of Shares
Outstanding, beginning	8,651	3,410	360
Warrants issued	16,315	5,316	3,175
Warrants exercised		(75)	(125)
Outstanding, ending	24,966	8,651	3,410
Weighted Average Exercise Price Per Share
Outstanding, beginning	$ 1.53	$ 1.48	$ 2.08
Warrants issued	$ 1.03	$ 1.56	$ 1.40
Warrants exercised		$ 0.78	$ 1.40
Outstanding, ending	$ 1.23	$ 1.53	$ 1.48
Weighted Average Remaining Contractual Life (Years)
Outstanding, June 30, 2013	4 years 2 months 5 days
Aggregate Intrinsic Value
Outstanding, June 30, 2013