Note 4 - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2013

Valuation and Qualifying Accounts [Abstract]

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, 2013	$	111,996		-	$	(106,504	)	$	(727	)	$	(3,594	)	$	1,171
December 31, 2012		80,926		-		77,143			242			(46,315	)		111,996
December 31, 2011		146,929		-		(45,315	)		156			(20,844	)		80,926