Property, Plant and Equipment - Summary of Property,Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 21,977	$ 19,111
Accumulated depreciation and amortization	(7,894)	(7,116)
Property, plant and equipment - net	14,083	11,995
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,240	3,240
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,396	5,396
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,622	2,900
Equipment and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,261	6,231
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,458	$ 1,344

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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