Summary of Significant Accounting Policies - Additional Information as to Company's Revenue from Operations in most Significant Geographical Areas (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Total revenue	$ 52,859	$ 20,083
United States [Member]
Segment Reporting Information [Line Items]
Total revenue	32,066	15,219
Japan [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 19,532	$ 4,766