Detail of Selected Balance Sheet Accounts (Activity in Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Balance at beginning of period	$ 746	$ 1,577
Bad debt expense	248	283
Uncollectible accounts written off, net of recoveries	26	(2)
Change in foreign currency translation	(10)	(14)
Balance at end of period	$ 1,010	$ 1,844