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Income Taxes (Deferred Tax Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
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Income Tax Disclosure [Abstract] |  |
Non-current deferred tax asset | $ 389 | $ 7,330
Non-current deferred tax liability | (17,171) | (261)
Net deferred tax (liability) asset | (16,782) | 7,069
Depreciation and amortization | (1,037) | (480)
Lease asset | (3,415) | 0
Lease liability | 4,477 | 0
Inventories | 979 | 536
Compensation costs | 3,698 | 3,675
Other accruals | 3,985 | 3,870
Tax credit carryforwards | 6,021 | 4,911
Valuation allowance | (4,372) | (3,810)
Identifiable intangible assets | (27,118) | (1,633)
Net deferred tax (liability) asset | $ (16,782) | $ 7,069

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