Income taxes.

No definition available.

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- Definition

Operating loss carryforwards expiration year.

+ References

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- Definition

Reversal of deferred tax asset valuation allowance.

+ References

No definition available.

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- Definition

Share based compensation expenses excludes from net operating loss carryforwards.

+ References

No definition available.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

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- Definition

The aggregate cash inflow comprised of the amount received from (a) employees to acquire the entity's shares under incentive awards, including stock option exercises and restricted stock arrangements, and (b) the excess tax benefit arising from such transactions.

+ References

No definition available.

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

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-Paragraph 15A

-Subparagraph (a)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Taxes [Line Items]
Excess benefit for share-based payments		$ 5,200,000
Reversal of deferred tax asset valuation allowance	$ 27,500,000
Valuation allowance			$ 37,500,000
Unrecognized tax benefits	244,000	244,000	234,000	$ 224,000
Impact on effective tax rate if recognized	154,000	154,000	154,000
Interest and penalties		120,000	$ 110,000
Domestic Country
Income Taxes [Line Items]
Net operating loss (NOL) carryforwards	$ 31,700,000	$ 31,700,000
Operating loss carry forwards expiration year		2031
Share based compensation expenses excludes from net operating loss carryforwards		$ 14,600,000
Maximum [Member] \| State And Local Jurisdiction
Income Taxes [Line Items]
Operating loss carry forwards expiration year		2032