Goodwill and Other Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019
Intangible Assets
Amortization of customer relationships, patents, non-competes and other intangibles	$ 50	$ 50	$ 150	$ 205
Total intangible assets, Gross Amount	6,191		6,191		$ 6,191
Finite-lived intangible assets, Accumulated Amortization	(1,057)		(1,057)		(907)
Carrying Amount	5,134		5,134		5,284
Customer relationships
Intangible Assets
Finite-Lived Intangible Assets, Gross	2,100		2,100		2,100
Finite-lived intangible assets, Accumulated Amortization	(824)		(824)		(718)
Finite-lived intangible assets, Carrying Amount	1,276		1,276		1,382
Other Intangible Assets
Intangible Assets
Finite-Lived Intangible Assets, Gross	291		291		291
Finite-lived intangible assets, Accumulated Amortization	(233)		(233)		(189)
Finite-lived intangible assets, Carrying Amount	58		58		102
Trademarks
Intangible Assets
Indefinite-lived intangible assets	$ 3,800		$ 3,800		$ 3,800