Summary of Significant Accounting Policies - EPS and SBC (Details)		1 Months Ended				12 Months Ended
	Nov. 11, 2014 shares	Aug. 31, 2016 shares	May 31, 2016 item shares	Jan. 31, 2015 item shares	Nov. 30, 2012 item shares	Jun. 30, 2016 USD ($) item $ / shares shares	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares
Computation of Net Loss per Common Share
Options outstanding to purchase common stock and unvested restricted stock						11,919,000	9,739,000	8,486,000
Common stock equivalents under treasury stock method for options (in shares)						735,000	770,000	1,820,000
Shares issuable upon conversion of convertible notes (in shares) | item						23,878,000
Common stock equivalents under if-converted method for convertible notes (in shares)						718,000
Additional disclosure for options
Cash received for exercise of stock options | $						$ 5,161,000	$ 4,429,000	$ 9,136,000
Stock options
Number of Stock Options
Exercised (in shares)						(555,000)
Stock options | Chief Executive Officer
Additional disclosure for options
Stock compensation cost due to modification | $						$ 3,100,000	0	0
Restricted stock | Officer
Stock-Based Compensation
Vesting period		3 years
Service period		5 years
Number of Restricted Stock
Awarded (in shares)		117,800
Deferred share units
Additional disclosure for options
Stock compensation expense | $						$ 380,000	389,000	433,000
2006 Plan
Stock-Based Compensation
Number of employee share-based compensation plans | item						1
Additional number of shares authorized for issuance	5,500,000
Common stock authorized for issuance (in shares)	17,500,000
Additional disclosure for options
Stock compensation expense | $						$ 21,900,000	$ 15,300,000	$ 15,600,000
Estimated fair value of unvested employee awards, net of estimated forfeitures | $						$ 26,600,000
Weighted average vesting period of unvested employee awards						2 years
2006 Plan | Stock options
Weighted-average assumptions used to estimate the fair value of each stock option
Number of group of awards for which expected term is calculated for and applied | item						1
Dividend (as a percent)						0.00%	0.00%	0.00%
Volatility (as a percent)						66.34%	60.86%	60.40%
Risk-free interest rate (as a percent)						1.80%	1.84%	1.74%
Expected life						6 years 3 months 18 days	6 years 3 months 18 days	6 years 3 months 18 days
Weighted-average grant date fair values of options granted (in dollars per share) | $ / shares						$ 8.91	$ 6.04	$ 10.50
Number of Stock Options
Outstanding at the beginning of the period (in shares)						9,689,000
Granted (in shares)						3,340,000
Exercised (in shares)						(555,000)
Forfeited/Canceled (in shares)						(661,000)
Outstanding at the end of the period (in shares)						11,813,000	9,689,000
Vested or unvested and expected to vest at the end of the period (in shares)						11,475,000
Exercisable at the end of the period (in shares)						6,453,000	5,380,000	4,637,000
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares						$ 12.49
Granted (in dollars per share) | $ / shares						14.34
Exercised (in dollars per share) | $ / shares						9.30
Forfeited/Canceled (in dollars per share) | $ / shares						14.84
Outstanding at the end of the period (in dollars per share) | $ / shares						13.03	$ 12.49
Vested or unvested and expected to vest at the end of the period (in dollars per share) | $ / shares						13.05
Exercisable at the end of the period (in dollars per share) | $ / shares						$ 12.63	$ 11.89	$ 9.79
Weighted-Average Remaining Life (in years)
Outstanding at the end of the period						6 years 9 months 26 days
Vested or unvested and expected to vest at the end of the period						6 years 9 months 4 days
Exercisable at the end of the period						5 years 3 months 18 days
Additional disclosure for options
Total fair value of options vested | $						$ 15,298,000	$ 16,145,000	$ 12,535,000
Total intrinsic value of options exercised | $						3,142,000	3,275,000	9,961,000
Cash received for exercise of stock options | $						$ 5,161,000	$ 4,429,000	$ 9,136,000
2006 Plan | Stock options | Maximum
Stock-Based Compensation
Vesting period						4 years
Exercise period						10 years
2006 Plan | Restricted stock | Officer
Stock-Based Compensation
Vesting period			4 years	4 years	4 years
Number of Restricted Stock
Number of officers | item			3	3	3
Unvested at the beginning of the period (in shares)						50,000,000
Awarded (in shares)			75,000	25,000	50,000	75,000,000
Vested (in shares)						(18,750,000)
Unvested at the end of the period (in shares)						106,250,000	50,000,000
Weighted-Average Exercise Price
Unvested at the beginning of the period (in dollars per share) | $ / shares						$ 9.23
Awarded (in dollars per share) | $ / shares						5.65
Vested (in dollars per share) | $ / shares						10.13
Unvested at the end of the period (in dollars per share) | $ / shares						$ 6.54	$ 9.23
Former Plan
Number of Stock Options
Granted (in shares)						1,676,599