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Note H - Derivative Instruments - Foreign Currency Hedge Contracts - Effect of derivatives on statement of operations (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Notes to Financial Statements
Foreign exchange contracts - located in research and development expenses	$ (4,000)	$ (12,000)

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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