Share-based Compensation (Schedule of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Number of Shares
Options outstanding, beginning balance (in shares)	6,385,000
Granted (in shares)	0	0
Exercised (in shares)	(417,000)
Cancelled (in shares)	(597,000)
Options outstanding, ending balance (in shares)	5,371,000		6,385,000
Exercisable at period end (in shares)	3,999,000
Vested and expected to vest at period end (in shares)	5,371,000
Weighted-Average Exercise Price Per Share
Options outstanding, beginning balance (in dollars per share)	$ 4.10
Exercised (in dollars per share)	3.46
Cancelled (in dollars per share)	4.47
Options outstanding, ending balance (in dollars per share)	4.11		$ 4.10
Exercisable (in dollars per share)	4.37
Vested and expected to vest (in dollars per share)	$ 4.11
Weighted-Average Remaining Contractual Term
Options outstanding	3 years 6 months 11 days		3 years 8 months 12 days
Exercisable	2 years 11 months 19 days
Vested and expected to vest	3 years 6 months 11 days
Aggregate Intrinsic Value
Options outstanding	$ 4,117		$ 1,416
Exercisable	2,249
Vested and expected to vest	$ 4,117