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Income Taxes (Deferred Tax Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]    
Non-current deferred tax asset $ 6,665 $ 9,211
Non-current deferred tax liability (334) (534)
Net deferred tax asset 6,331 8,677
Uncollectible accounts and other reserves 1,000 1,063
Depreciation and amortization (369) (673)
Inventories 740 824
Compensation costs 3,388 5,863
Tax carryforwards 7,063 7,514
Valuation allowance (3,291) (5,952)
Identifiable intangible assets (2,298) (581)
Other 98 619
Net deferred tax asset $ 6,331 $ 8,677