Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Deferred income tax assets:
Net operating loss carry forwards	$ 3,926	$ 5,005
AMT credit carryforward	183	185
Stock based compensation	140	140
Accrued expenses	1,666	1,202
Other items, net	45	45
Total deferred tax asset	5,960	6,577
Deferred tax liability:
Equipment and intangible assets	(3,615)	(2,440)
Net deferred tax asset	$ 2,345	$ 4,137