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Note 13 - Commitment (Details Textual) - USD ($)		6 Months Ended
	Mar. 25, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 30, 2020	Sep. 23, 2015
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					8,681
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 12.00	$ 28.80
Technology Transfer Institute [Member] | Sales Incentive Agreement With TTI [Member]
Related Party Agreement, Term (Year)	1 year
Related Party Transaction, Revenue Needed to Trigger Payment of Sales Incentive Fee	$ 5,000,000
Related Party Transaction, Revenue to Trigger Payment of Sales Incentive Fee, Percent of Net Income, Minimum	20.00%
Related Party Transaction, Sales Incentive Fee For Each 5 Million Revenue	$ 500,000
Stock Issuable for Sales Incentive Fee Per Each 5 Million Revenue (in shares)	62,500
Related Party Transaction, Maximum Revenue, Warrants Issuable	$ 25,000,000
Revenue from Related Parties		$ 0	$ 0
Technology Transfer Institute [Member] | Sales Incentive Agreement With TTI [Member] | Warrants Issuable for Each 1 Million Revenue in Excess of 20 Million [Member]
Warrants and Rights Outstanding, Term (Year)	5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	12,500
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 12.00
Technology Transfer Institute [Member] | Sales Incentive Agreement With TTI [Member] | Maximum [Member]
Related Party Transaction, Maximum Revenue to Trigger Payment of Sales Incentive Fee	$ 20,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	62,500
Stock Issuable for Sales Incentive Agreement (in shares)	250,000

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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