Note 9 - Segment Information - Revenues by Geographic Area (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022		Jun. 30, 2021		Dec. 31, 2021
Total revenue	$ 592,137		$ 390,595		$ 1,102,723		$ 817,079
Accounts receivable	404,477				404,477				$ 236,338
UNITED STATES
Total revenue	444,251		287,192		842,289		534,706
Accounts receivable	282,860				282,860				134,695
Non-US [Member]
Total revenue	147,886	[1]	$ 103,403	[1]	260,434	[2]	$ 282,373	[2]
Accounts receivable	$ 121,617				$ 121,617				$ 101,643

[1] Net revenues to Canada represented 11% for the three months ended June 30, 2022. Net revenues to Germany represented 10% of total net revenues for the three months ended June 30, 2021.

[2] Net revenues to any one foreign country did not exceed 10% for the six months ended June 30, 2022. Net revenues to India represented 15% of total net revenues for the six months ended June 30, 2021.