Note 2 - Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

		2014			2013
Reserve for product warranty, beginning of period	$	35,190		$	69,655
Provision for product warranty		51,210			42,300
Product warranty expirations		(52,900	)		(57,800	)
Product warranty costs paid		-			(18,965	)
Reserve for product warranty, end of period	$	33,500		$	35,190

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	%