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Acquired Intangible Assets (Detail) - Intangible assets - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Impaired Intangible Assets [Abstract]
Gross	$ 1,173	$ 1,173
Accumulated Amortization	1,006	886
Net	$ 167	$ 287
Customer list
Impaired Intangible Assets [Abstract]
Weighted Average Remaining Amortization Period	2 years	3 years
Gross	$ 910	$ 910
Accumulated Amortization	773	682
Net	$ 137	$ 228
Non-compete agreements
Impaired Intangible Assets [Abstract]
Weighted Average Remaining Amortization Period	0 years	0 years
Gross	$ 93	$ 93
Accumulated Amortization	93	93
Net	$ 0	$ 0
Developed technology
Impaired Intangible Assets [Abstract]
Weighted Average Remaining Amortization Period	0 years	0 years
Gross	$ 30	$ 30
Accumulated Amortization	30	29
Net	$ 0	$ 1
Trade name
Impaired Intangible Assets [Abstract]
Weighted Average Remaining Amortization Period	1 year	2 years
Gross	$ 140	$ 140
Accumulated Amortization	110	82
Net	$ 30	$ 58

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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