Goodwill and Other Intangible Assets, Net (Tables)

6 Months Ended

Mar. 31, 2018

Goodwill and Other Intangible Assets, Net

Summary of intangible assets

	Gross		Accumulated		Carrying
September 30, 2017	Amount		Amortization		Amount
Patents	$	4,030	$	(3,656)	$	374
Trademarks		3,800		—		3,800
Customer relationships		2,100		(426)		1,674
Other		291		(73)		218
	$	10,221	$	(4,155)	$	6,066

	Gross		Accumulated		Carrying
March 31, 2018	Amount		Amortization		Amount
Patents	$	4,030	$	(3,816)	$	214
Trademarks		3,800		—		3,800
Customer relationships		2,100		(501)		1,599
Other		291		(102)		189
	$	10,221	$	(4,419)	$	5,802

Schedule of estimated future aggregate amortization expense

Estimated future Aggregate Amortization Expense:
Year Ended September 30,
2018	$	263
2019		256
2020		198
2021		180
2022		133
Thereafter		972