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Detail of Selected Balance Sheet Accounts (Activity in Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Balance Sheet Related Disclosures [Abstract] |  |  |
Balance at beginning of period | $ 746 | $ 1,577 |
Bad debt expense (recovery) | 187 | (29) | $ 1,074
Uncollectible accounts written off, net of recoveries | (120) | (749) |
Change due to foreign currency translation | (2) | (53) |
Balance at end of period | $ 811 | $ 746 | $ 1,577

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- Definition Allowance for doubtful accounts receivable write offs (recoveries). + References No definition available. + Details
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Period Type: | duration

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- Definition Increase decrease due to foreign currency translation. + References No definition available. + Details
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- Definition Provision for recovery of doubtful accounts. + References No definition available. + Details
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Balance Type: | debit
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 + Details
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Period Type: | instant

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- References No definition available. + Details
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