Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
Intangible Assets [Line Items]
Definite-lived intangible assets, Accumulated Amortization	$ (6,422)	$ (6,033)
Intangible assets, Gross Carrying Amount	22,924	8,793
Intangible assets, Net	16,502	$ 2,760
Customer Lists and Relationships [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	16,417
Definite-lived intangible assets, Accumulated Amortization	(4,674)
Definite-lived intangible assets, Net	$ 11,743
Customer Lists and Relationships [Member] | Minimum [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	7 years
Customer Lists and Relationships [Member] | Maximum [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	10 years
Customer Lists [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)		9 years
Definite-lived intangible assets, Gross Carrying Amount		$ 5,132
Definite-lived intangible assets, Accumulated Amortization		(4,363)
Definite-lived intangible assets, Net		$ 769
Core Technology [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	8 years	8 years
Definite-lived intangible assets, Gross Carrying Amount	$ 530	$ 530
Definite-lived intangible assets, Accumulated Amortization	$ (530)	$ (530)
Developed Technology [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	7 years
Definite-lived intangible assets, Gross Carrying Amount	$ 1,814
Definite-lived intangible assets, Accumulated Amortization	(29)
Definite-lived intangible assets, Net	$ 1,785
Non-compete [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	5 years	5 years
Definite-lived intangible assets, Gross Carrying Amount	$ 230	$ 230
Definite-lived intangible assets, Accumulated Amortization	(23)	(12)
Definite-lived intangible assets, Net	$ 207	$ 218
Patents and Other [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	16 years 9 months 18 days	16 years 9 months 18 days
Definite-lived intangible assets, Gross Carrying Amount	$ 2,321	$ 2,321
Definite-lived intangible assets, Accumulated Amortization	(1,166)	(1,128)
Definite-lived intangible assets, Net	1,155	1,193
Definite-Lived Intangible Assets [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	21,312	8,213
Definite-lived intangible assets, Accumulated Amortization	(6,422)	(6,033)
Definite-lived intangible assets, Net	14,890	2,180
In-Process Research And Development [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net	956
Trademarks and Trade Names [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net	$ 656
Trademarks [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net		$ 580