Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2021	Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Gross	$ 10,518	$ 10,892
Accumulated Amortization	(5,358)	(5,573)
Impairment	(3,894)	(3,894)
Net	1,266	1,425
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross	8,396	8,396
Accumulated Amortization	(4,101)	(4,021)
Impairment	(3,894)	(3,894)
Net	$ 401	$ 481
Useful life	10 years	10 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross	$ 2,122	$ 2,122
Accumulated Amortization	(1,257)	(1,178)
Impairment	0	0
Net	$ 865	$ 944
Useful life	10 years	10 years
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross		$ 374
Accumulated Amortization		(374)
Impairment		0
Net		$ 0
Useful life		3 years