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Note 4 - Derivative instrument assets/liabilities: (Detail) - Summary of Company's forward exchange contracts to trade U.S. dollars in exchange for Canadian dollars as follows:y had forward exchange contracts to trade U.S. dollars in exchange f (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Foreign currency forward contracts designated as cash flow hedges	Derivative instruments
Foreign currency forward contracts designated as cash flow hedges	$ 377,703
Foreign currency forward contracts not designated as cash flow hedges	Derivative instruments
Foreign currency forward contracts not designated as cash flow hedges	67,079
Foreign currency forward contracts not designated as cash flow hedges		(699,483)
Total foreign currency forward contracts	Derivative instruments
Total foreign currency forward contracts	444,782
Total foreign currency forward contracts		$ (699,483)

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