Goodwill and Intangible Assets - Intangible Assets by Major Class Subject to Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Components of intangible assets by major class subject to amortization
Original Cost	$ 21,813	$ 21,813
Accumulated Amortization	12,843	10,747
Impairment	2,289	0
Currency Translation	133	72
Net Book Value	$ 6,814	$ 11,138
Trade name
Components of intangible assets by major class subject to amortization
Weighted Average Life at September 30,	8 years	8 years
Original Cost	$ 2,776	$ 2,776
Accumulated Amortization	1,564	1,240
Impairment	310	0
Currency Translation	19	9
Net Book Value	$ 921	$ 1,545
Non-compete agreement
Components of intangible assets by major class subject to amortization
Weighted Average Life at September 30,	5 years	5 years
Original Cost	$ 1,600	$ 1,600
Accumulated Amortization	1,584	1,547
Impairment	0	0
Currency Translation	0	0
Net Book Value	$ 16	$ 53
Technology asset
Components of intangible assets by major class subject to amortization
Weighted Average Life at September 30,	5 years	5 years
Original Cost	$ 1,869	$ 1,869
Accumulated Amortization	749	389
Impairment	0	0
Currency Translation	50	37
Net Book Value	$ 1,170	$ 1,517
Customer relationships
Components of intangible assets by major class subject to amortization
Weighted Average Life at September 30,	10 years	10 years
Original Cost	$ 15,568	$ 15,568
Accumulated Amortization	8,946	7,571
Impairment	1,979	0
Currency Translation	64	26
Net Book Value	$ 4,707	$ 8,023