Goodwill and Other Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Intangible Assets
Amortization of customer relationships, patents, non-competes and other intangibles	$ 118	$ 115	$ 322	$ 231
Total intangible assets, Gross Amount	6,897		6,897		$ 6,897
Finite-lived intangible assets, Accumulated Amortization	(1,633)		(1,633)		(1,311)
Carrying Amount	5,264		5,264		5,586
Customer relationships
Intangible Assets
Finite-Lived Intangible Assets, Gross	2,100		2,100		2,100
Finite-lived intangible assets, Accumulated Amortization	(1,062)		(1,062)		(995)
Finite-lived intangible assets, Carrying Amount	1,038		1,038		1,105
Other Intangible Assets
Intangible Assets
Finite-Lived Intangible Assets, Gross	997		997		997
Finite-lived intangible assets, Accumulated Amortization	(571)		(571)		(316)
Finite-lived intangible assets, Carrying Amount	426		426		681
Trademarks
Intangible Assets
Indefinite-lived intangible assets	$ 3,800		$ 3,800		$ 3,800