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		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total revenue	$ 53,438	$ 25,284	$ 106,297	$ 45,367
United States [Member]
Segment Reporting Information [Line Items]
Total revenue	31,789	18,256	63,854	33,475
Japan [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 20,468	$ 6,734	$ 39,999	$ 11,502