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Note 1 - Organization and Business (Details Textual) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 USD ($) | Apr. 30, 2020 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Number of Countries in which Entity Operates |  |  | 60 |
April 6, 2020 Public Offering [Member] |  |  |  |
Proceeds from Issuance of Common Stock |  | $ 4.6 | $ 16.9 |
June 30, 2020 Public Offering [Member] |  |  |  |
Proceeds from Issuance of Common Stock | $ 13.4 |  |  | $ 2.7

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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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