Summary of Significant Accounting Policies - Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Sep. 30, 2016
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,102	$ 7,378
Accumulated Amortization	(3,187)	(3,278)
Net Carrying Amount	3,915	4,100
Customer lists
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,387	2,432
Accumulated Amortization	(1,172)	(1,164)
Net Carrying Amount	$ 1,215	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	$ 3,014	3,214
Accumulated Amortization	(1,576)	(1,678)
Net Carrying Amount	$ 1,438	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	$ 1,441	1,455
Accumulated Amortization	(200)	(219)
Net Carrying Amount	$ 1,241	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	$ 260	277
Accumulated Amortization	(239)	(217)
Net Carrying Amount	$ 21	$ 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