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Assets and Liabilities that are Required to be Presented on Balance Sheet at Fair Value, Recurring (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent liabilities	$ 841	$ 841
Contingent Liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent liabilities	841	841	758
Fair Value, Inputs, Level 3 | Contingent Liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent liabilities	$ 841	$ 841

X

- Definition

Noncurrent portion of the fair value as of the acquisition date of potential payments under the contingent consideration arrangement, including cash and shares as applicable.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionContingentConsiderationAtFairValueNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration