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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Sep. 30, 2012
--- | --- | ---
Income Tax Disclosure [Line Items] |  |
Net operating loss | $ 3,892 | $ 4,787
Uniform capitalization and inventory | 2,510 | 3,683
Reserve for accrued employee benefits | 1,517 | 1,546
Deferred compensation | 1,297 | 1,013
Goodwill | 1,198 | 1,285
Stock-based compensation | 1,291 | 729
Warranty accrual | 1,101 | 1,336
Workers’ compensation | 185 | 360
Depreciation and amortization | 953 | 1,366
Postretirement benefits liability | 396 | 373
Allowance for doubtful accounts | 209 | 367
Accrued legal | 57 | 114
Other | 115 | 15
Gross deferred tax asset | 14,721 | 16,974
Less: valuation allowance | (135) | (7,498)
Deferred tax asset | 14,586 | 9,476
Uncompleted contracts | (845) | (2,455)
Deferred tax liabilities | (845) | (2,455)
Net deferred income tax asset | $ 13,741 | $ 7,021

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