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Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Deferred tax assets: |  |
Stock-based compensation | $ 2,646 | $ 3,067
Net operating loss carryforwards | 9,419 | 8,568
Research credit carryforwards | 5,570 | 3,890
Intangibles | 58 | 0
Other, net | 90 | 354
Total deferred assets | 17,783 | 15,879
Deferred tax liabilities: |  |
Intangibles | 0 | (181)
Foreign deferred liabilities | (5,811) | (8,032)
Net deferred tax asset | 11,972 | 7,666
Valuation allowance for net deferred tax assets | (931) | (472)
Net deferred tax asset | $ 11,041 | $ 7,194

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