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Note 8 - Stock-based Compensation Expense - Compensation Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-based compensation	$ 91,721	$ 62,078	$ 188,831	$ 112,451
Cost of Revenue [Member]
Stock-based compensation	8,440	0	16,880	0
Research and Development Expense [Member]
Stock-based compensation	13,417	0	26,316	0
Selling and Shipping [Member]
Stock-based compensation	5,398	0	10,796	0
General and Administrative [Member]
Stock-based compensation	$ 64,466	$ 62,078	$ 134,839	$ 112,451

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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