Note 4 - Valuation and Qualifying Accounts (Details) - Roll Forward of the Allowance for Doubtful Accounts (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Roll Forward of the Allowance for Doubtful Accounts [Abstract]
Balance at beginning of year	$ 111,996	$ 80,926	$ 146,929
Additions (reductions) charged to costs and expenses	(106,504)	77,143	(45,315)
Foreign exchange gain/loss	(727)	242	156
Write-offs	(3,594)	(46,315)	(20,844)
Balance at end of year	$ 1,171	$ 111,996	$ 80,926