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Detail of Selected Balance Sheet Accounts (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Allowance for doubtful accounts
Balance at beginning of period	$ 1,043	$ 1,508	$ 391	$ 907
Increase (decrease) in bad debt expense	(127)	(524)	509	82
Deductions for uncollectible accounts written off, net of recoveries	175	(221)	175	(225)
Increase (decrease) due to foreign currency translation	5	(4)	21	(5)
Balance at end of period	$ 1,096	$ 759	$ 1,096	$ 759

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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