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