Employee Equity Incentive Plans (Details Textual) (USD $)	6 Months Ended			6 Months Ended	1 Months Ended	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012	Mar. 31, 2013 Common Stock [Member]	Nov. 15, 2012 2005 Equity Incentive Plan [Member]	Mar. 31, 2013 2003 Stock Option Plan [Member]	Mar. 31, 2013 2003 Stock Option Plan [Member] Maximum [Member]	Mar. 31, 2013 2003 Stock Option Plan [Member] Minimum [Member]	Mar. 31, 2013 Restricted stock units [Member]	Mar. 31, 2013 Performance RSUs [Member]	Mar. 31, 2013 Performance RSUs [Member] Maximum [Member]	Mar. 31, 2013 Performance RSUs [Member] Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional authorized shares for issuance					325,000
Restricted stocks units outstanding to consultants	0								0
Common Stock contractual term				10 years
Period stock options vest quarterly						3 years
Unrecognized compensation cost related to unvested shares									$ 3,700,000
Total unrecognized compensation cost related to unvested Shares expected to be recognized over a weighted average period	2 years 9 months 18 days								3 years
Shares of restricted stock with a weighted average grant date fair value, value									$ 2.01
Company awarded performance based RSU	1,166,301									325,434
Actual number of shares to be awarded											100.00%	0.00%
Additional actual number of shares to be awarded							100.00%	0.00%
Vesting Period						4 years				3 years
Percentage shares vesting on first anniversary date						25.00%				50.00%
Percentage shares vesting quarterly after first anniversary date						75.00%				50.00%
Additional performance RSUs outstanding	30,000
Company awarded performance based RSU										30,000
Performance RSUs outstanding	9,424,703		8,142,468							321,434
Restricted stock units balance vesting period						3 years				2 years
Employee Equity Incentive Plans (Textual) [Abstract]
Shares of common stock reserve for future issuance subject to outstanding	13,515,843
Outstanding options and other awards	12,511,461
Shares based award for future grants	1,004,382
Option grants to employees, description	Stock Options. Stock options are granted with an exercise price equal to the current market price of the Company’s common stock at the grant date and have 10-year contractual terms. For option grants to employees, generally 25% of the option shares vest and become exercisable on the first anniversary of the grant date and the remaining 75% of the option shares vest and become exercisable quarterly in equal installments thereafter over three years
Options grants to employees vest and exercisable on first anniversary of grant date	25.00%
Options grants to employees vest and exercisable in equal installments over next three years	75.00%
Weighted average grant date fair value of option granted	$ 1.79	$ 1.59
Total intrinsic value of option exercised based on the differences in market prices	576,000	1,800,000
Tax benefit realized from exercise of stock options	0	0
Grant date fair value of Restricted Stock Units granted	3,100,000	2,100,000
Total unrecognized compensation cost related to unvested options	$ 9,800,000
Weighted average period for total unrecognized compensation cost related to unvested options	2 years 9 months 18 days								3 years
Restricted stock units grant to employees, description	RSUs granted to employees generally vest based on three or four years of continuous service from the date of grant. RSUs granted to non-employee directors generally vest over the term of one year from the grant date and are not released until the awardee’s termination of service
Vested restricted stock units granted to directors not issued until the director resigns	1,162,465