Equity Securities and Stock-Based Compensation (Details 3) shares in Thousands	12 Months Ended
	Sep. 30, 2015 $ / shares shares
Equity Securities and Stock-based Compensation
Maximum shares to be issued upon exercise of options and other awards	3,827
Weighted-average exercise price of outstanding options and other awards | $ / shares	$ 7.73
Shares remaining available for future issuance under existing equity compensation plans	3,625
Plans Approved by Stockholders
Equity Securities and Stock-based Compensation
Maximum shares to be issued upon exercise of options and other awards	3,602
Weighted-average exercise price of outstanding options and other awards | $ / shares	$ 7.28
Shares remaining available for future issuance under existing equity compensation plans	3,625
Plans Not Approved by Stockholders
Equity Securities and Stock-based Compensation
Maximum shares to be issued upon exercise of options and other awards	225
Weighted-average exercise price of outstanding options and other awards | $ / shares	$ 14.97
Shares remaining available for future issuance under existing equity compensation plans	0