Note 3 - Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	2015			2014
Reserve for product warranty, beginning of period	$	33,500		$	35,190
Provision for product warranty		29,900			51,210
Product warranty expirations		(23,300	)		(52,900	)
Product warranty costs paid		-			-
Reserve for product warranty, end of period	$	40,100		$	33,500