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Income Taxes (Deferred Tax Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
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Income Tax Disclosure [Abstract] |  |
Non-current deferred tax asset | $ 439 | $ 389
Non-current deferred tax liability | (13,493) | (17,171)
Net deferred tax liability | (13,054) | (16,782)
Depreciation and amortization | (1,399) | (1,037)
Lease asset | (3,683) | (3,415)
Lease liability | 4,941 | 4,477
Inventories | 755 | 979
Compensation costs | 4,064 | 3,698
Other accruals | 6,387 | 3,985
Tax credit carryforwards | 3,026 | 6,021
Valuation allowance | (2,186) | (4,372)
Identifiable intangible assets | $ (24,959) | $ (27,118)

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