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Note 7 - Share-based Compensation - Compensation Cost (Details) - Selling, General and Administrative Expenses [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Share-based compensation | $ 692 | $ 501
Common Stock [Member] |  |
Share-based compensation | 100 | 100
Employee and Nonemployee Stock Option [Member] |  |
Share-based compensation | 53 | 53
Restricted Stock Units (RSUs) [Member] |  |
Share-based compensation | $ 539 | $ 348

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Details
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