Net Classification of Deferred Income Tax Assets and Liabilities in Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Deferred income tax assets, net	$ 236	$ 246
Deferred income tax liabilities, net	(51)	(45)
Net deferred income tax assets	$ 185	$ 201

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as noncurrent.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant