Note 3 - Significant Accounting Policies (Tables)

9 Months Ended

Sep. 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		136,700			51,210
Product warranty expirations		(23,300	)		(52,900	)
Product warranty costs paid		(7,490	)		-
Reserve for product warranty, end of period	$	139,410		$	33,500