Acquired Intangible Assets (Detail) - Intangible assets - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Impaired Intangible Assets [Abstract]
Gross	$ 1,173	$ 1,173
Accumulated Amortization	757	628
Net	$ 416	$ 545
Customer list
Impaired Intangible Assets [Abstract]
Weighted Average Remaining Amortization Period	4 years	5 years
Gross	$ 910	$ 910
Accumulated Amortization	591	500
Net	$ 319	$ 410
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	1 year	2 years
Gross	$ 30	$ 30
Accumulated Amortization	19	9
Net	$ 11	$ 21
Trade Name
Impaired Intangible Assets [Abstract]
Weighted Average Remaining Amortization Period	3 years	4 years
Gross	$ 140	$ 140
Accumulated Amortization	54	26
Net	$ 86	$ 114