Note 2 - Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

	2013			2012
Reserve for product warranty, beginning of period	$	69,655		$	86,400
Provision for product warranty		42,300			24,500
Product warranty expirations		(57,800	)		(32,400	)
Product warranty costs paid		(18,965	)		(8,845	)
Reserve for product warranty, end of period	$	35,190		$	69,655

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2013
	5 year options
Expected Life		6.5
Expected volatility		123.3	%
Risk-free interest rate		0.75	%