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Equity - Other contributed equity - Additional Information (Detail) - shares
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2017
Jun. 30, 2019
Oct. 31, 2016
Sep. 14, 2016
Statement of changes in equity [abstract]          
Number of ordinary shares issued 94,598,369   62,166,673   20,000,000
Number of ordinary shares available for conversion 1,865,000     16,000,000  
Percentage of capital acquired by third party for early conversion of convertibles notes   50.00%      
Number of convertible note may be converted into ordinary shares 1,856,000