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

Restricted Cash and Cash Equivalents

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Restricted Cash and Cash Equivalents
12 Months Ended
Mar. 31, 2015
Receivables [Abstract]  
Restricted Cash and Cash Equivalents

4.  Restricted Cash and Cash Equivalents

Included in restricted cash and cash equivalents is US$5.0 million related to an insurance policy at 31 March 2015 and 2014, which restricts the cash from use for general corporate purposes.