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Stock-Based Compensation - Summary of Stock Options Activity (Detail) - AUD / shares	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding Options, Number, Beginning balance	104,027	511,780
Exercised, Outstanding Options, Number	(55,131)	(333,287)
Forfeited, Outstanding Options, Number		(74,466)
Outstanding Options, Number, Ending balance	48,896	104,027
Outstanding Options, Weighted Average Exercise Price, Beginning balance	AUD 7.22	AUD 8.17
Exercised, Outstanding Options, Weighted Average Exercise Price	7.97	8.54
Forfeited, Outstanding Options, Weighted Average Exercise Price		7.85
Outstanding Options, Weighted Average Exercise Price, Ending balance	AUD 6.38	AUD 7.22

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Number of share options (or share units) exercised during the current period.

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