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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013
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Income Tax Disclosure [Abstract] |  |
Net operating loss | $ 6,236 | $ 3,892
Uniform capitalization and inventory | 2,529 | 2,510
Deferred compensation | 1,611 | 1,297
Stock-based compensation | 1,529 | 1,291
Reserve for accrued employee benefits | 1,444 | 1,396
Depreciation and amortization | 1,217 | 944
Warranty accrual | 643 | 1,042
Goodwill | 474 | 1,198
Postretirement benefits liability | 252 | 396
Allowance for doubtful accounts | 495 | 163
Workers’ compensation | 128 | 185
Accrued legal | 65 | 57
Credit carryforwards and other | 1,109 | 845
Gross deferred tax asset | 17,732 | 15,216
Less: valuation allowance | (903) | (865)
Deferred tax asset | 16,829 | 14,351
Uncompleted contracts |  | (845)
Other | (110) |
Deferred tax liabilities | (110) | (845)
Net deferred income tax asset | $ 16,719 | $ 13,506

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