Note 4 - Derivative Instrument Assets And Liabilities (Detail) - Fair value of derivative instruments in the consolidated balance sheets (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Foreign currency forward contracts designated as cash flow hedges	Derivative instruments
Foreign currency forward contracts designated as cash flow hedges	$ (215,483)	$ 377,703
Foreign currency forward contracts not designated as cash flow hedges	Derivative instruments
Foreign currency forward contracts not designated as cash flow hedges	23,339	67,079
Total foreign currency forward contracts	Derivative instruments
Total foreign currency forward contracts	$ (192,144)	$ 444,782