Summary of Significant Accounting Policies - Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2017	Sep. 30, 2016
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,168	$ 7,378
Accumulated Amortization	(3,428)	(3,278)
Net Carrying Amount	3,740	4,100
Customer lists
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,398	2,432
Accumulated Amortization	(1,271)	(1,164)
Net Carrying Amount	$ 1,127	1,268
Customer lists | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	6 years
Customer lists | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	10 years
Technology
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,062	3,214
Accumulated Amortization	(1,678)	(1,678)
Net Carrying Amount	$ 1,384	1,536
Technology | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	5 years
Technology | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	10 years
Trade names
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,444	1,455
Accumulated Amortization	(226)	(219)
Net Carrying Amount	$ 1,218	1,236
Trade names | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	10 years
Trade names | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	15 years
Other
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 264	277
Accumulated Amortization	(253)	(217)
Net Carrying Amount	$ 11	$ 60
Other | Minimum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	2 years
Other | Maximum
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Useful Life	10 years