Losses per share (Tables)

12 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Summary of Loss Per Share

	Year Ended June 30,
	2018			2017			2016
Losses per share
(in cents)
(a) Basic losses per share
From continuing operations attributable to the ordinary    equity holders of the company		(7.58	)		(19.25	)		(1.13	)
Total basic losses per share attributable to the ordinary    equity holders of the company		(7.58	)		(19.25	)		(1.13	)
(b) Diluted losses per share
From continuing operations attributable to the ordinary    equity holders of the company		(7.58	)		(19.25	)		(1.13	)
Total basic losses per share attributable to the ordinary    equity holders of the company		(7.58	)		(19.25	)		(1.13	)
(c) Reconciliation of losses used in calculating losses per    share
(in U.S. dollars, in thousands)
Basic losses per share
Losses attributable to the ordinary equity holders of the    company used in calculatingbasic losses per share:
From continuing operations		(35,290	)		(76,815	)		(4,127	)
Diluted losses per share
Losses from continuing operations attributable to the    ordinary equity holders of thecompany:
Used in calculating basic losses per share		(35,290	)		(76,815	)		(4,127	)
Losses attributable to the ordinary equity holders of the    company used in calculatingdiluted losses per share		(35,290	)		(76,815	)		(4,127	)
	2018 Number			2017 Number			2016 Number
Weighted average number of ordinary shares used as the    denominator in calculating basic lossesper share		465,688,997			399,042,172			364,208,554
Weighted average number of ordinary shares and    potential ordinary shares used in calculating diluted losses    per share		465,688,997			399,042,172			364,208,554