Property, Plant and Equipment - Summary of Property,Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 18,366	$ 18,238
Accumulated depreciation and amortization	(8,149)	(7,729)
Property, plant and equipment - net	10,217	10,509
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	2,930	2,902
Equipment and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,488	5,383
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,312	$ 1,317