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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.

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- Definition

The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction.

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No definition available.

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