Preferred Stock Warrants - Additional Information (Detail) (USD $)	1 Months Ended			12 Months Ended
	May 31, 2010	Dec. 31, 2009	Jan. 31, 2006	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2008
Class of Warrant or Right [Line Items]
Warrants issued to purchase shares of Series E convertible preferred stock			272,684
Exercise price of warrants			3.300492
Warrants exercised (in shares)	12,239	261,323					11,361
Cash consideration for exercise of remaining outstanding warrants		$ 862,000		$ 0	$ 0	$ 862,000
Revaluation of preferred stock warrants				0	0	(346,000)
Warrants reclassified from warrant liability to preferred stock		$ 2,900,000