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

Stock-Based Compensation - Summary of Stock Options Available for Grant and Outstanding Options Activity (Detail)

v3.4.0.3
Stock-Based Compensation - Summary of Stock Options Available for Grant and Outstanding Options Activity (Detail) - AUD / shares
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Shares Available for Grant, Beginning balance 24,754,902 23,947,127
Granted (1,410,560) (1,192,225)
New Shares Authorized 5,000,000 2,000,000
Forfeitures Available for Re-grant 74,466  
Shares Available for Grant, Ending balance 28,418,808 24,754,902
Outstanding Options, Number, Beginning balance 511,780 1,099,276
Exercised, Outstanding Options, Number (333,287) (587,496)
Forfeited, Outstanding Options, Number (74,466)  
Outstanding Options, Number, Ending balance 104,027 511,780
Outstanding Options, Weighted Average Exercise Price, Beginning balance AUD 8.17 AUD 8.11
Exercised, Outstanding Options, Weighted Average Exercise Price 8.54 8.06
Forfeited, Outstanding Options, Weighted Average Exercise Price 7.85  
Outstanding Options, Weighted Average Exercise Price, Ending balance AUD 7.22 AUD 8.17