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Stockholders' Equity (Details 2) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, beginning balance	3,512,286
Weighted Average Exercise Price Per Share, beginning balance	$ 3.39
Weighted Average Remaining Contractual Term, beginning balance	6 years 6 months 11 days	6 years 5 months 16 days
Number of Shares, Granted	394,563
Weighted Average Exercise Price Per Share, Granted	$ 2.52
Number of Shares, Exercised	(46,067)
Weighted Average Exercise Price Per Share, Exercised	$ 0.81
Number of Shares, Cancelled	(80,311)
Weighted Average Exercise Price Per Share, Cancelled	$ 7.77
Number of Shares, ending balance	3,780,471	3,512,286
Weighted Average Exercise Price Per Share, ending balance	$ 3.23	$ 3.39
Weighted Average Remaining Contractual Term, ending balance	6 years 6 months 11 days	6 years 5 months 16 days

X

- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ 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)(iv)(3)

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-Paragraph A240

-Subparagraph b(1)(f)

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

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

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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