Note 11 - Concentrations (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

	Year Ended December 31,
	2019		2018
United States	$	1,108,000	$	1,614,000
Costa Rica		582,000		601,000
India		225,000		211,000
All other countries		113,000		136,000
Total equipment, net	$	2,028,000	$	2,562,000