Note 4 - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Product Warranty Liability [Table Text Block]

Year ended:	Balance at beginning of  year		Reserve "purchased" during year		Additions (reductions) charged to costs and expenses			Foreign exchange gain/loss		Write-offs			Balance  at end of year
December 31, 2012	$	80,926		-		77,143			242		(46,315	)	$	111,996
December 31, 2011	$	146,929		-		(45,315	)		156		(20,844	)	$	80,926
December 31, 2010	$	136,023		-		25,348			595		(15,037	)	$	146,929