Share-Based Compensation (Details 2) (USD $)	12 Months Ended
Sep. 30, 2012
Stock options outstanding
Exercise Prices, Lower limit	$ 0.46
Exercise Prices, Upper limit	$ 3.13
Number Outstanding	3,463,339
Weighted Average Remaining Contractual Life	5 years 22 days
Weighted Average Exercise Price	$ 1.31
Number Exercisable	2,575,857
Weighted Average Exercise Price	$ 1.25
Range One [Member]
Stock options outstanding
Exercise Prices, Lower limit	$ 0.46
Exercise Prices, Upper limit	$ 1.00
Number Outstanding	746,482
Weighted Average Remaining Contractual Life	1 year 2 months 9 days
Weighted Average Exercise Price	$ 0.48
Number Exercisable	746,169
Weighted Average Exercise Price	$ 0.48
Range Two [Member]
Stock options outstanding
Exercise Prices, Lower limit	$ 1.01
Exercise Prices, Upper limit	$ 1.50
Number Outstanding	1,916,157
Weighted Average Remaining Contractual Life	7 years 1 month 6 days
Weighted Average Exercise Price	$ 1.29
Number Exercisable	1,170,032
Weighted Average Exercise Price	$ 1.28
Range Three [Member]
Stock options outstanding
Exercise Prices, Lower limit	$ 1.51
Exercise Prices, Upper limit	$ 2.00
Number Outstanding	408,700
Weighted Average Remaining Contractual Life	10 months 21 days
Weighted Average Exercise Price	$ 1.85
Number Exercisable	376,106
Weighted Average Exercise Price	$ 1.87
Range Four [Member]
Stock options outstanding
Exercise Prices, Lower limit	$ 2.01
Exercise Prices, Upper limit	$ 2.50
Number Outstanding	276,500
Weighted Average Remaining Contractual Life	8 years 2 months 16 days
Weighted Average Exercise Price	$ 2.26
Number Exercisable	186,103
Weighted Average Exercise Price	$ 2.25
Range Five [Member]
Stock options outstanding
Exercise Prices, Lower limit	$ 2.51
Exercise Prices, Upper limit	$ 3.13
Number Outstanding	115,500
Weighted Average Remaining Contractual Life	3 years 5 months 5 days
Weighted Average Exercise Price	$ 2.65
Number Exercisable	97,447
Weighted Average Exercise Price	$ 2.64

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

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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-Subparagraph b(1)(a, b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

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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- Definition

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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