Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 33,575	$ 32,737
Accumulated depreciation and amortization	(17,783)	(16,777)
Property, plant and equipment - net	15,792	15,960
Depreciation and amortization	1,600	2,100	$ 2,200
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,990	4,891
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,408	13,364
Equipment and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,934	9,056
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,243	$ 5,426