Goodwill and Intangible Assets - Intangible Assets by Major Class Subject to Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Components of intangible assets by major class subject to amortization
Original Cost	$ 17,334	$ 17,924
Accumulated Amortization	13,906	12,815
Impairment	0	0
Currency Translation	(108)	(33)
Net Book Value	$ 3,320	$ 5,076
Trade name
Components of intangible assets by major class subject to amortization
Weighted average life	8 years	8 years
Original Cost	$ 1,876	$ 2,466
Accumulated Amortization	1,503	1,821
Impairment	0	0
Currency Translation	(13)	(4)
Net Book Value	$ 360	$ 641
Technology asset
Components of intangible assets by major class subject to amortization
Weighted average life	5 years	5 years
Original Cost	$ 1,869	$ 1,869
Accumulated Amortization	1,544	1,128
Impairment	0	0
Currency Translation	(28)	(10)
Net Book Value	$ 297	$ 731
Customer relationships
Components of intangible assets by major class subject to amortization
Weighted average life	10 years	10 years
Original Cost	$ 13,589	$ 13,589
Accumulated Amortization	10,859	9,866
Impairment	0	0
Currency Translation	(67)	(19)
Net Book Value	$ 2,663	$ 3,704