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Note 6 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Intangible assets | $ 691,974 | $ 749,501
Less Accumulated amortization | (357,231) | (269,441)
Intangible assets, net | 334,743 | 480,060
Customer Relationships [Member] |  |
Intangible assets | 502,957 | 544,770
Patents [Member] |  |
Intangible assets | $ 189,017 | $ 204,731

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