NOTE 7 - INTANGIBLE ASSETS - Amortization Expense (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	$ 91,507	$ 209,070
Finite-Lived Intangible Asset, Expected Amortization, Year Two	366,028	209,070
Finite-Lived Intangible Asset, Expected Amortization, Year Three	366,028	209,070
Finite-Lived Intangible Asset, Expected Amortization, Year Four	333,883	209,070
Finite-Lived Intangible Asset, Expected Amortization, Year Five	9,737	209,070
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	153,363	520,190
Finite-Lived Patents, Gross	150,716	111,256	$ 75,658	$ 46,749
[custom:FiniteLivedIntangibleAssetsAccumulatedAmortizationTotal-0]	1,320,546	1,565,540
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	1,884	5,563
Finite-Lived Intangible Asset, Expected Amortization, Year Two	7,536	5,563
Finite-Lived Intangible Asset, Expected Amortization, Year Three	7,536	5,563
Finite-Lived Intangible Asset, Expected Amortization, Year Four	7,536	5,563
Finite-Lived Intangible Asset, Expected Amortization, Year Five	7,536	5,563
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	118,688	83,441
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	89,073	201,220
Finite-Lived Intangible Asset, Expected Amortization, Year Two	356,291	201,220
Finite-Lived Intangible Asset, Expected Amortization, Year Three	356,291	201,220
Finite-Lived Intangible Asset, Expected Amortization, Year Four	324,146	201,220
Finite-Lived Intangible Asset, Expected Amortization, Year Five		201,220
Finite-Lived Intangible Asset, Expected Amortization, after Year Five		402,439
[custom:FiniteLivedIntangibleAssetsAccumulatedAmortizationTotal-0]	1,125,801	1,408,539
Acquisition-related Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	550	2,287
Finite-Lived Intangible Asset, Expected Amortization, Year Two	2,201	2,287
Finite-Lived Intangible Asset, Expected Amortization, Year Three	2,201	2,287
Finite-Lived Intangible Asset, Expected Amortization, Year Four	2,201	2,287
Finite-Lived Intangible Asset, Expected Amortization, Year Five	2,201	2,287
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	34,675	34,310
[custom:FiniteLivedIntangibleAssetsAccumulatedAmortizationTotal-0]	$ 44,029	$ 45,745

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Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of the costs pertaining to the exclusive legal rights granted to the owner of the patent to exploit an invention or a process for a period of time specified by law. Such costs may have been expended to directly apply and receive patent rights, or to acquire such rights.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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