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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Sep. 30, 2014
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Income Tax Disclosure [Abstract] |  |
Net operating loss | $ 9,877 | $ 6,236
Uniform capitalization and inventory | 1,895 | 2,529
Deferred compensation | 1,848 | 1,611
Stock-based compensation | 993 | 1,529
Reserve for accrued employee benefits | 1,482 | 1,444
Depreciation and amortization |  | 1,217
Warranty accrual | 915 | 643
Goodwill | 398 | 474
Postretirement benefits liability |  | 252
Allowance for doubtful accounts | 166 | 495
Workers’ compensation | 8 | 128
Accrued legal | 60 | 65
Credit carryforwards and other | 1,329 | 1,109
Deferred tax assets | 18,971 | 17,732
Depreciation and amortization | (2,705) |
Other | (12) | (110)
Deferred tax liabilities | (2,717) | (110)
Less: valuation allowance | (10,056) | (903)
Net deferred income tax asset | $ 6,198 | $ 16,719

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