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Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 AUD
Maximum [Member]
Summary Of Significant Accounting Policy [Line Items]
Research and development tax incentives	AUD 20,000,000
Tax incentive rate related to research and development	50.00%
Minimum [Member] | Australia [Member]
Summary Of Significant Accounting Policy [Line Items]
Tax incentive rate related to research and development	50.00%

X

- Definition

Percentage of project expenditures needed to be incurred for no clawback.

+ References

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+ Details

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X

- Definition

Percentage required for research and development expenses incurred to not be subject to clawback.

+ References

No definition available.

+ Details

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X

- Definition

Summary of significant accounting policy.

+ References

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X

- Definition

Tax incentive research and development activities.

+ References

No definition available.

+ Details

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- Details

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- Details

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