Equity - Schedule of Common Stock Reserved for Future Issuances (Details)	Sep. 30, 2014	Sep. 30, 2013	Oct. 01, 2009
Equity [Abstract]
Exercise of outstanding stock options	1,431,190	1,745,948
Unvested restricted stock units	966,579
Purchases under the employee stock purchase plan	1,092,983
Issuance of stock-based awards under the Equity Plans	1,107,206
Exercise of outstanding warrants	400,001	400,001	3
Purchases under the officer and director share purchase plan	88,741
Total reserved	5,086,700