Note 6 - Share Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended September 30,		Three Months Ended September 30,
	2020		2019
Selling, general and administrative	$	51,157	$	121,999
Research, development and engineering		3,073		15,102
	$	54,230	$	137,101

	Nine Months Ended September 30,		Nine Months Ended September 30,
	2020		2019
Selling, general and administrative	$	632,793	$	690,612
Research, development and engineering		76,995		103,577
	$	709,788	$	794,189