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Stockholders Equity (Details 5) (USD $)	12 Months Ended
	Sep. 30, 2012
Significant ranges of outstanding and exercisable options
Number of Options Outstanding	3,512,286
Weighted Average Remaining Contractual Life (in Years)	6 years 5 months 16 days
Weighted Average Exercise Price	$ 3.39
Number of Exercisable Options	2,074,410
Weighted Average Exercise Price of Exercisable Options	$ 1.44
Number of Unvested Options	1,437,876
Range One [Member]
Significant ranges of outstanding and exercisable options
Range of Exercise Prices, Lower Range	$ 0.09
Range of Exercise Prices, Upper Range	$ 0.70
Number of Options Outstanding	358,840
Weighted Average Remaining Contractual Life (in Years)	5 years 3 months 7 days
Weighted Average Exercise Price	$ 0.33
Number of Exercisable Options	358,840
Weighted Average Exercise Price of Exercisable Options	$ 0.33
Number of Unvested Options
Range Two [Member]
Significant ranges of outstanding and exercisable options
Range of Exercise Prices, Lower Range	$ 0.79
Range of Exercise Prices, Upper Range	$ 0.82
Number of Options Outstanding	787,319
Weighted Average Remaining Contractual Life (in Years)	5 years 5 months 5 days
Weighted Average Exercise Price	$ 0.80
Number of Exercisable Options	695,145
Weighted Average Exercise Price of Exercisable Options	$ 0.80
Number of Unvested Options	92,174
Range Three [Member]
Significant ranges of outstanding and exercisable options
Range of Exercise Prices, Lower Range	$ 1.06
Range of Exercise Prices, Upper Range	$ 2.32
Number of Options Outstanding	729,302
Weighted Average Remaining Contractual Life (in Years)	2 years 6 months 22 days
Weighted Average Exercise Price	$ 1.21
Number of Exercisable Options	729,302
Weighted Average Exercise Price of Exercisable Options	$ 1.21
Number of Unvested Options
Range Four [Member]
Significant ranges of outstanding and exercisable options
Range of Exercise Prices, Lower Range	$ 2.60
Range of Exercise Prices, Upper Range	$ 5.90
Number of Options Outstanding	948,575
Weighted Average Remaining Contractual Life (in Years)	8 years 9 months 4 days
Weighted Average Exercise Price	$ 3.34
Number of Exercisable Options	199,448
Weighted Average Exercise Price of Exercisable Options	$ 2.74
Number of Unvested Options	749,127
Range Five [Member]
Significant ranges of outstanding and exercisable options
Range of Exercise Prices, Lower Range	$ 6.39
Range of Exercise Prices, Upper Range	$ 11.68
Number of Options Outstanding	688,250
Weighted Average Remaining Contractual Life (in Years)	9 years 2 months 19 days
Weighted Average Exercise Price	$ 10.30
Number of Exercisable Options	91,675
Weighted Average Exercise Price of Exercisable Options	$ 9.54
Number of Unvested Options	596,575

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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