Schedule II Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Allowance for Doubtful Accounts [Member]
Balance at Beginning of Period	$ 794		$ 852		$ 622
Charged to costs and expenses	445		192		314
Charged to other accounts	81	[1]	53	[1]	102	[1]
Deductions	(232)	[2]	(303)	[2]	(186)	[2]
Balance at End of Period	1,088		794		852
Inventory Obsolescence Reserve [Member]
Balance at Beginning of Period	272		252		52
Charged to costs and expenses	189		27		217
Charged to other accounts	0		0		0
Deductions	(123)	[3]	(7)	[3]	(17)	[3]
Balance at End of Period	$ 338		$ 272		$ 252

[1] Collection of accounts previously written off

[2] Uncollectible accounts written off

[3] Inventory written off