Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Deferred income tax assets:
Allowance for doubtful accounts	$ 50	$ 99
Inventories	4,444	4,335
Capitalized research and development costs	89	355
Property, plant and equipment and other	1	71
Net operating loss carryforwards, tax credits and deferrals	393	433
Stock-based compensation	347	333
Accrued product warranty	799	734
Accrued compensated absences	443	408
Insurance and other reserves	965	819
Deferred Tax Assets, Gross, Total	7,531	7,587
Deferred income tax liabilities:
Allowance for doubtful accounts	(122)	(120)
Intangible assets	(144)	(58)
Comprehensive income	121	(92)
Property, plant and equipment and other	(3,527)	(2,645)
Subtotal deferred income tax asset	4,129	4,672
Valuation allowance	(87)
Net deferred income tax asset	4,042	4,672
U. S. [Member]
Deferred income tax assets:
Allowance for doubtful accounts	47	97
Inventories	4,472	4,335
Capitalized research and development costs	89	355
Stock-based compensation	347	333
Accrued product warranty	787	723
Accrued compensated absences	443	408
Insurance and other reserves	938	788
Deferred Tax Assets, Gross, Total	7,123	7,039
Deferred income tax liabilities:
Intangible assets	(144)	(58)
Comprehensive income	121	(92)
Property, plant and equipment and other	(3,056)	(2,645)
Subtotal deferred income tax asset	4,044	4,244
Net deferred income tax asset	4,044	4,244
Non U. S. [Member]
Deferred income tax assets:
Allowance for doubtful accounts	3	2
Inventories	(28)
Property, plant and equipment and other	1	71
Net operating loss carryforwards, tax credits and deferrals	393	433
Accrued product warranty	12	11
Insurance and other reserves	27	31
Deferred Tax Assets, Gross, Total	408	548
Deferred income tax liabilities:
Allowance for doubtful accounts	(122)	(120)
Property, plant and equipment and other	(201)
Subtotal deferred income tax asset	85	428
Valuation allowance	(87)
Net deferred income tax asset	$ (2)	$ 428