Goodwill and Other Intangible Assets, Net (Tables)

6 Months Ended

Mar. 31, 2019

Goodwill and Other Intangible Assets, Net

Summary of intangible assets

	Gross		Accumulated		Carrying
September 30, 2018	Amount		Amortization		Amount
Patents	$	4,030	$	(3,977)	$	53
Trademarks		3,800		—		3,800
Customer relationships		2,100		(574)		1,526
Other		291		(131)		160
	$	10,221	$	(4,682)	$	5,539

	Gross		Accumulated		Carrying
March 31, 2019	Amount		Amortization		Amount
Trademarks	$	3,800	$	—	$	3,800
Customer relationships		2,100		(647)		1,453
Other		291		(160)		131
	$	6,191	$	(807)	$	5,384

Schedule of estimated future aggregate amortization expense

Estimated future Aggregate Amortization Expense:
Year Ended September 30,
2019	$	101
2020		198
2021		179
2022		133
2023		129
Thereafter		844