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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2019
Income Tax Disclosure [Abstract] |  |  |
Valuation allowance | $ 3,291 | [1] | $ 3,810
Income tax provision for Tax Cuts & Jobs Act of 2017 | $ 3,000 |  |
Tax Credit Carryforward [Line Items] |  |  |
U.S. capital loss carryforward |  |  | 2,600
United States Federal Tax Jurisdiction |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Federal and state research and development tax credits |  |  | 2,400
U.S. capital loss carryforward |  |  | 2,200
Deferred Tax Assets, Other Tax Carryforwards |  |  | 100
Foreign Tax Authority |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Non-U.S. operating losses |  |  | $ 300
[1] | Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which we adopted on October 1, 2018.

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