Detail of Selected Balance Sheet Accounts (Activity in Allowance for Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Detail of Selected Balance Sheet Accounts [Abstract]
Balance at beginning of period	$ 673	$ 928	$ 572	$ 1,297
Bad debt recovery	(170)	(59)	(60)	(380)
Uncollectible accounts written off, net of recoveries		(28)	(9)	(85)
Change in foreign currency translation	(2)	(23)	(2)	(14)
Balance at end of period	$ 501	$ 818	$ 501	$ 818