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Note 15 - Subsequent Events	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 15— SUBSEQUENT EVENTS On November 9, 2021, Leonard Osser, Managing Director, China Operations exercised 171,429 options awarded in 2016 at a stock price $1.93.

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- References

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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