Note 6 - Financial Risk Management and Derivatives (Detail) (USD $)	Sep. 30, 2012
Notional Amount of Cash Flow Hedge Instruments	$ 27,802,000
Contract to Sell Foreign Currencies [Member]
Notional Amount of Cash Flow Hedge Instruments	4,002,000
Contract to Buy Foreign Currencies [Member]
Notional Amount of Cash Flow Hedge Instruments	$ 23,800,000

Aggregate notional amount of all derivatives designated as cash flow hedging instruments. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Name:	us-gaap_NotionalAmountOfCashFlowHedgeInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant