CONSOLIDATED STATEMENTS OF SHAREHOLDERS' (DEFICIT) EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Balance at Jun. 30, 2013	$ 847	$ 697,767	$ (576,767)	$ 121,847
Balance (in shares) at Jun. 30, 2013	84,725
Increase (Decrease) in Shareholders' (Deficit) Equity
Net loss			(71,364)	(71,364)
Stock options exercised	$ 11	9,125		9,136
Stock options exercised (in shares)	1,134
Stock option and restricted stock compensation expense		15,647		15,647
Directors' deferred share units converted	$ 1	(1)
Directors' deferred share units converted (in shares)	44
Directors' deferred share unit compensation		433		433
Balance at Jun. 30, 2014	$ 859	722,971	(648,131)	75,699
Balance (in shares) at Jun. 30, 2014	85,903
Increase (Decrease) in Shareholders' (Deficit) Equity
Net loss			(60,739)	(60,739)
Stock options exercised	$ 7	4,422		4,429
Stock options exercised (in shares)	651
Restricted stock award (in shares)	25
Stock option and restricted stock compensation expense		15,326		15,326
Directors' deferred share unit compensation		389		389
Balance at Jun. 30, 2015	$ 866	743,108	(708,870)	$ 35,104
Balance (in shares) at Jun. 30, 2015	86,579			86,579
Increase (Decrease) in Shareholders' (Deficit) Equity
Net loss			(144,817)	$ (144,817)
Stock options exercised	$ 5	5,156		5,161
Stock options exercised (in shares)	555
Restricted stock award	$ 1	(1)
Restricted stock award (in shares)	75
Stock option and restricted stock compensation expense		21,868		21,868
Directors' deferred share unit compensation		380		380
Balance at Jun. 30, 2016	$ 872	$ 770,511	$ (853,687)	$ (82,304)
Balance (in shares) at Jun. 30, 2016	87,209			87,209