Note 1 - Nature of Business and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended September 30,
	2020		2019		2020			2019
					(percent of revenues)
System revenue	$	611,976	$	407,399		47.5	%		16.7	%
Maintenance revenue		624,892		735,023		48.5	%		30.1	%
Service and other revenue		51,691		1,296,397		4.0	%		53.2	%
Total revenues	$	1,288,559	$	2,438,819		100.0	%		100.0	%

	Nine Months Ended September 30,
	2020		2019		2020			2019
					(percent of revenues)
System revenue	$	1,727,826	$	2,564,781		45.4	%		42.3	%
Maintenance revenue		1,939,367		2,099,295		50.9	%		34.6	%
Service and other revenue		141,293		1,397,712		3.7	%		23.1	%
Total revenues	$	3,808,486	$	6,061,788		100.0	%		100.0	%

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	For the Nine Months Ended September 30,
	2020						2019
	% Revenues			% AR			% Revenues			% AR
Major		12.0	%		43.5	%		38.9	%		40.2	%
All Others		88.0	%		56.5	%		61.1	%		59.8	%
Total		100.0	%		100.0	%		100.0	%		100.0	%

	For the Three Months Ended
	September 30,
	2020			2019
	% Revenues			% Revenues
Major		28.8	%		49.2	%
All Others		71.2	%		50.8	%
Total		100.0	%		100.0	%