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Stockholders' Equity (Detail 4) (USD $)	12 Months Ended
	Sep. 30, 2014
Options Outstanding
Number Outstanding (in shares)	1,465,907
Weighted-Average Remaining Contractual Life	6 years 1 month 6 days
Weighted-Average Exercise Price (in dollars per share)	$ 19.50
$3.00 - 8.00
Summary of information about stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 3.00
Exercise price, high end of range (in dollars per share)	$ 8.00
Options Outstanding
Number Outstanding (in shares)	148,448
Weighted-Average Remaining Contractual Life	4 years 2 months 12 days
Weighted-Average Exercise Price (in dollars per share)	$ 7.38
$8.23 - $46.72
Summary of information about stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 8.23
Exercise price, high end of range (in dollars per share)	$ 46.72
Options Outstanding
Number Outstanding (in shares)	1,317,459
Weighted-Average Remaining Contractual Life	6 years 6 months 7 days
Weighted-Average Exercise Price (in dollars per share)	$ 20.87
$3.00 - $46.72
Summary of information about stock options outstanding and exercisable
Exercise price, low end of range (in dollars per share)	$ 3.00
Exercise price, high end of range (in dollars per share)	$ 46.72
Options Exercisable
Number Exercisable (in shares)	890,103
Weighted-Average Remaining Contractual Life	4 years 4 months 17 days
Weighted-Average Exercise Price (in dollars per share)	$ 16.15

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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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-Publisher FASB

-Name Accounting Standards Codification

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Weighted average remaining contractual term of exercisable 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 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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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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