Discontinued Operations, Assets Held for Sale, and Business Divestiture - Components of Balance Sheet Accounts Classified as Assets and Liabilities Held for Sale (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Jan. 30, 2015	Sep. 30, 2014
Assets:
Receivables, net	$ 0		$ 91
Deferred income taxes	0		15
Prepaid expenses and other current assets	0		22
Asset held for sale	0		264
Current assets of business from discontinued operations	0		392
Liabilities:
Accounts payable	10		23
Accrued liabilities	0		173
Total current liabilities of business from discontinued operations	10		196
Cash proceeds from sale of building and land, net of selling expenses		$ 1,422

Discontinued Operations, Assets Held for Sale, and Business Divestiture - Components of Balance Sheet Accounts Classified as Assets and Liabilities Held for Sale (Detail) (USD $)
In Thousands, unless otherwise specified

Mar. 31, 2015

Jan. 30, 2015

Sep. 30, 2014

Assets:

Receivables, net

$ 0us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet

$ 91us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet

Deferred income taxes

0us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssets

15us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssets

Prepaid expenses and other current assets

0us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets

22us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets

Asset held for sale

0us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssetsCurrent

264us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssetsCurrent

Current assets of business from discontinued operations

0us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

392us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

Liabilities:

Accounts payable

10us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable

23us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable

Accrued liabilities

0us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities

173us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities

Total current liabilities of business from discontinued operations

10us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent

196us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent

Cash proceeds from sale of building and land, net of selling expenses

$ 1,422us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration

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Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

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Amount classified as accrued liabilities attributable to disposal group held for sale or disposed of.

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Amount classified as long lived assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759

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Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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