Summary of Significant Accounting Policies - Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2017	Sep. 30, 2016
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,463	$ 7,378
Accumulated Amortization	(3,820)	(3,278)
Net Carrying Amount	3,643	4,100
Customer lists
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,446	2,432
Accumulated Amortization	(1,406)	(1,164)
Net Carrying Amount	$ 1,040	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	$ 3,274	3,214
Accumulated Amortization	(1,876)	(1,678)
Net Carrying Amount	$ 1,398	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	$ 1,460	1,455
Accumulated Amortization	(257)	(219)
Net Carrying Amount	$ 1,203	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	$ 283	277
Accumulated Amortization	(281)	(217)
Net Carrying Amount	$ 2	$ 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