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Note 10 - Capital Stock and Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Share-based compensation | $ 4,411 | $ 4,169
Continuing Operations [Member] | Cost of Sales [Member] |  |
Share-based compensation | 121 | 118
Continuing Operations [Member] | Selling and Marketing Expense [Member] |  |
Share-based compensation | 557 | 507
Continuing Operations [Member] | General and Administrative Expense [Member] |  |
Share-based compensation | 3,487 | 3,416
Continuing Operations [Member] | Research and Development Expense [Member] |  |
Share-based compensation | $ 246 | $ 128

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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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