Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
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