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Income Taxes (Deferred Tax Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018 | [1] | Sep. 30, 2017
--- | --- | --- | --- | ---
Income Tax Disclosure [Abstract] |  |  |
Non-current deferred tax asset | $ 7,330 | $ 6,600 | $ 9,278
Non-current deferred tax liability | (261) | (334) |
Net deferred tax asset | 7,069 | 6,266 |
Depreciation and amortization | (480) | (856) |
Inventories | 536 | 740 |
Compensation costs | 3,675 | 3,388 |
Other accruals | 3,870 | 1,422 |
Tax credit carryforwards | 4,911 | 7,063 |
Valuation allowance | (3,810) | (3,291) |
Identifiable intangible assets | (1,633) | (2,298) |
Other | 0 | 98 |
Net deferred tax asset | $ 7,069 | $ 6,266 |
[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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