Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Exchange Rates Used to Convert Australian Dollar to US Dollars (Detail)

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Summary of Significant Accounting Policies - Schedule of Exchange Rates Used to Convert Australian Dollar to US Dollars (Detail)
 12 Months Ended
Mar. 31, 2013
ExchangeRate
Mar. 31, 2012
ExchangeRate
Mar. 31, 2011
ExchangeRate
Assets and liabilities 0.9597 0.9614 0.9676
Statements of operations 0.9694 0.9573 1.0584
Cash flows - beginning cash 0.9614 0.9676 1.0919
Cash flows - ending cash 0.9597 0.9614 0.9676
Cash flows - current period movements 0.9694 0.9573 1.0584