Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
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