Income Taxes - Income Tax Benefit from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Income Tax Provision Accompanying Consolidated Statements of Operation
Loss before income tax benefit	$ (8,207)	$ (7,531)
Income tax benefit at U.S. federal statutory rates	(1,723)	(1,582)
Tax effect of:
Foreign rate differential	1,698	694
State and local income taxes	14	(25)
Impact of tax law changes	0	820
Federal tax credits	(144)	(1,573)
Valuation allowance	(556)	1,243
Prior year tax adjustments	0	(211)
Other	10	273
Income tax benefit	$ (701)	$ (361)

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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