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Note 3 Foreign Currency Forward Contract (Details) - Foreign Exchange Forward [Member] $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) | Sep. 30, 2017 USD ($)
Derivatives Designated as Accounting Hedges: |  |
Derivative [Line Items] |  |
Derivative Notional Amount | $ 102,102 | $ 105,523
Number of contracts | 55 | 58
Maximum Length of Time Hedged | 12 months |
Derivatives Not Designated as Accounting Hedges: |  |
Derivative [Line Items] |  |
Derivative Notional Amount | $ 291,469 | $ 302,944
Number of contracts | 44 | 46
Maximum Remaining Maturity | 2 months |

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- Definition Maximum period of time the entity is hedging its exposure to variability in future cash flows for forecasted transactions, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes forecasted transactions related to payment of variable interest on existing financial instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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