Concentration Of Credit Risk And Significant Customers - Additional Information (Detail)	3 Months Ended	12 Months Ended	3 Months Ended
	Jun. 30, 2013 Accounts Receivable	Mar. 31, 2013 Accounts Receivable	Jun. 30, 2013 Sales Revenue	Jun. 30, 2012 Sales Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage, number of customers	1	1	1	0